Your argument is basically that whatever the guy says is what the cops will believe, and they won't bother investigating further to see if what he says is the whole truth.
What if he's not the only guy the woman was with? What if he's lying to protect someone else? (yeah, sounds like a TV cop/lawyer show scenario, but the truth is not unoften stranger than fiction - or more revolting in some cases)
Just accepting the guy's word without confirming it is nuts.
The situation is that the accuser and the accursed both tell the same story, being together that night, and having sex with each other. The only difference between the stories is that one person says it was consensual, and the other one says it was not. There's no space for other people in that story, and the woman was conscious the thole time.
You're powerfully, incredibly, idiotically wrong. You're arguing against obtaining corroborating evidence for a critical element of the crime of rape. I still don't know why you're saying they don't need to be tested. Your only argument is "you don't have to test them," but not only have you ignored several reasons I've given for why you should test them all - you've insisted on returning to this same ridiculous straw man every single time.
No, I did not ignore the reasons you gave, I just did not accept them and instead showed why I think that all but one of the reasons you gave are powerfully, incredibly, idiotically, (What, the word I wanted to add is blocked? Bummer.) wrong, and explained why I think the other one is unethical.
And the only thing that makes sense is to test all of them. Relying on witness statements when you have actual physical evidence to prove an element of a crime is just insane. Really, it is. Your reason for not testing them "just because" is silly. Maybe give a better reason or at least rebut some of the reasons I've given.
The real idiocy in all of this is of course that the people who would usually probably spout "Believe the victim!" are suddenly all against "believing the victim" when the victim and the perpetrator both tell the same story.
Truly baffling, but I guess if your standard of evidence requires you to disbelieve both sides involved, even though they tell you the same thing, then there's not much use in having a discussion. Because I think that's utterly stupid and a waste of resources. If both sides tell you the exact same thing, and that story is plausible, and there's no reason to believe the accuser and the accused are both lying (which might be the case in a situation where the victim suddenly takes back the previous story to clear the accused, but not here), then there's absolutely no reason to draw in the rape kit, because it will just give you the information you already have.