To the extent we are talking about fights, and not "wrestling," there are almost always going to be injuries.
Even in rules-controlled, referee-supervised MMA, there are plenty of injuries sustained. Now, imagine
what happens in a fight with no rules and no referee.
Fighting is, by its very nature, a contest of trying to injure each other. If you think you have a fight fetish
and in your mind, no one gets hurt while participating, you need to start fantasizing about wrestling or
jumping rope, which do not have a set goal of inflicting injury - but still might cause injury anyway. It is
frustrating and ridiculous that one would claim to love fights but have moral objection to participants
getting injured. Those positions are factually incongruous.
For a million years, we have watched each other fight our rivals, with outright unashamed enjoyment.
Our movies, books, comics and lives are filled with conflict, drama and violence. The number one sex
fetish throughout the world, including among women, is BDSM. Just look at the "Fifty Shades of Grey"
phenomenon, where 250 million women bought books and/or movie tickets for a soft-core S&M story.
We humans are no doubt "hardwired" by evolution to enjoy violence. As long as the participants are
willing and not coerced, there is nothing immoral about watching and enjoying. You don't have to make
factually inconsistent excuses for your fetish.