Your premise is absurd.
If someone raped your girlfriend, would it be appropriate for the cops to catch the guy and then allow you to legally rape his girlfriend. Would that make you even? Would feel good about that, you know, destributing the rape more evenly. After all, rape is going to exist.
LOL and MY premise is absurd.
This is one of the worst hypotheticals I've ever read. But, I'll play along.
First of all, if my girlfriend was raped, I WOULD want vengeance. Raping his girlfriend wouldn't fall under my idea of revenge that makes sense, but I would at least want to beat his ass. However, if he was caught by the police, he would be meted out some legally ascribed vengeance. No one would be making the argument that two wrongs don't make a right.
Secondly, no rape is not inevitable. As a matter of fact, just a few posts ago you were claiming that we were splitting hairs over the idea of more discrimination vs the same amount of discrimination. In your ridiculous rape scenario, I'm not evenly distributing rapes, I'm needlessly becoming a rapist. People need jobs, housing, education, etc. People must compete for these things because there is a limited supply and they are not fungible. People do not need to rape or be raped.
Thirdly, if ,for some reason, there was a set number of rapes that, for some bizarre reason, had to occur every year, I would not want them all to occur to my girlfriend. If for some reason, all of the rapes happened to her, I'd be like "Damn. This is unfair!" If for some reason, they only happened to women of a certain race in a certain neighborhood, I'd think "Damn. This is unfair! What are the reasons behind this." If, for some bizarre reason, these rapes have to exist, I don't want them to be concentrated among one group of people if there are ways to prevent it and it makes sense to do so. If, for some bizarre reason, a certain number of rapes MUST exist, yes, I'd feel better if they were evenly distributed instead of concentrated among one group.