You may remember this discussion from a while ago, and in an effort to not disrupt things I held back my thoughts, now that its all settled (agree to disagree) The underlying issue with the Orc question seems to be, can evil be normal, or is it something else?
How can Evil Exist?
If Evil is a thing, a force, it is surely destruction. the desire to destroy for no other reason. there can be justified reasons when the need for one thing is greater than the need for a second thing and the first cannot exist without the destruction of the second, yet is that evil?
Laziness, maybe.
If there is a plot of land. 10m x 10m in Soviet Russia known as a sotka. It can cope with a house, a garden enough to grow food for one person for a year, and nothing else. if you need some of that land for a driveway and a carport for your car, you will need to destroy the garden. but do you?
You can move some of the soil needed for the garden into raised beds, ones that use 'vertical space' so the garden 'space' is not destroyed, just moved.
When You want to replace a very old house that has started to rot, you could take it apart plank by plank, discover all the reusable parts and store them for later use, maybe even in this new house, but the time cost to do that is greater than you can afford, so you employ a demolisher who rips down the house quickly, and throws away all the old wood. Destruction yes.. evil? hmm
If someone has not been trained to understand the cost of both sides, the benefit to store and keep the old wood, and the cost of time to take it apart, they have been trained only to demolish, this is not evil, its just a lack of choice. they know no other.
As a result, often, cultures that understand the choice, and come to other cultures that know no other choices, will likely expect them to learn of the choice, understand that destruction is evil, and creation is good. and so, choose creation.
Yet, if that culture, understanding that loss occurs with destruction, but instead of wanting to grow, wants all others to shrink, through destruction.. is that evil? well surely yes.
Orks are Evil.
This is my world is the evil of the Ork. They may wear armour they have scavenged from their enemies dead, as it afford them more time to destroy more of their enemy, and this is a good idea, but to take the time to create the armour? the cost for them is the time that could have been more destruction, would 10 years of creating armour create more destruction, no, because ultimately, the armour itself must also be destroyed,
even the destruction of themselves, through scarring, tattoos, piercings is considered a good way to participate in destruction. Old age is not considered good, If the amount of food they consume equates to 100kg of destruction, yet a younger man with the same food produces 200kg of destruction, and there is only one serve of food. the younger will get it, they will use the energy to destroy and the net output of destruction is served. as such, elderly orcs will often sacrifice themselves to the horde. their knowledge will only lead to more creation,
Humans have both capacities, can be trained in both capacities, and the path of creation leads to more creation, while the path to destruction always ends somewhere. the benefit of destruction is only to an evil god who wants more 'destruction', the 'food' they live on is destruction. So while some humans left with little choice, understanding, or training will resolve to destroy, as they know, no other way, or are too stubborn to change, the orc even when presented with the opportunity to learn it all, will only choose destruction.
Some scholarly magi, imprisoned some Orks and only gave them the choice to create, with magic, all destroyed items healed and destruction was no a choice, the Orcs slowly grew into what seemed like 'normal' intelligent beings, yet the minute they left the confines of the magical box that always healed everything, and destruction became a choice once more, they reverted almost instantly, and within months were not just savage, but moreso, their knowledge on how to destroy more effectively lead to entire tribes of Orks wiping out civilisations, until such time the chieftains died, their knowledge gone with them, the squabbling tribes after fell into old ways and were soon, destroyed, but not before wiping out continents of humans.
The Orks are not evil? well, I beg to differ.
Playing as an Ork, expect your campaign to end violently
If a Player wants to play as an Ork. Sure, it'll be an interesting thought experiment, as long as they, at every choice, can destroy something. it'll be true to the Ork nature.Arrive at a door, smash it down, enter a house, any furniture? smash it out of the way, fireplace? chuck everything in the fire so the place burns. people? kill them, why not? oh because my friends will block me? can I kill them? so I can kill the others? yes? ok, do it. no? oh, then I need to get more muscle, steal a deadlier weapon, then kill them, anyone who blocks an Ork from being able to destroy something needs to be so obviously stronger else the Ork will try to kill them. the only blocker is 'fear' that the other Ork wants to destroy it first, and by killing them, less destruction will happen.
A female Ork, giving birth to an Ork will know that their child will destroy more, will raise their little carnage beast with the expectation to destroy others.
Playing as an ORC on the other hand...