Almost every human civilization treated women as sex toys and brood mares for most of our history. Does that mean that's a natural part of the human condition? Slavery was a universal cultural thing more or less, existing in most nations in some form and on every continent. Is that also natural?
The examples of other violent games was just to show that violence in entertainment is common, so an argument as to why video game devs should avoid violence should apply to sports/cards/tabletop/TV/books/film/etc as well.
Video games are a neat meeting point of all of those listed media, sharing all their issues.
People who enjoy these things [football, etc] are... wrong.
People die, they get brain damage, many athletes get permanent back/leg/arm/etc. problems. The popularity of this stuff tends to tie into tribal identity issues. Do you think people would care as much if the teams weren't assigned to specific cities? They wouldn't.
Who are you tell those people that their lives are wrong. If they're making the informed choice to risk life and limb, that's their problem. Others climb mountains or jump out of planes... Which is stupidly dangerous, but it's some people's dedication. I don't understand them, but to flat out tell them they're wrong?? Wow.
As far as proving a negative, you are requiring us to prove a negative, unethical is the negative. You would only have to prove a positive, that it is ethical.
The 'un' prefix is grammaticaly negative... Thats go nothing to to with whether arguing on the side of right or wrong is the positive or negative side.
Violence is media is commonly acceptable at the moment. If you're arguing against it, you're arguing for change. You have to tell people why they should change
change.
Its cool though, your identity is tied up in violent sports and games. So having an argument with you is mostly pointless. Its almost impossible to dissuade people from their bad behavior because saying that such and such is bad, when they identify as a person who does such and such, implies something about them as a person, and people don't want to feel like a bad person. Even if they have to fall back on arguments of tradition instead of having an actual defense for their behavior.
That's just ridiculously unnecessary.
I don't watch football, or boxing, or any violent sports. I don't make violent videogames at the moment either. The last year's of my life have been dedicated to trying to find a way to inject fun/drama into a collisionless and weaponless racing game.
The next game to launch that I've worked on is
Wander, a non-combat, non-competitive MMO.
It's ok to accept and even present ideas that you don't personally believe in.
I have no idea why people choose to be boxers or footballers, and no idea why people watch it! But I can still defend their freedom to make those choices, as they're not harming me at all.
But sure, if you think that defending them means that my identity must be tied up in bloodsport, then you're not insulting me with that jab at all, you're only telling us about yourself with those words.