You clearly understand the ethical issue by the way you ended your comment.

I'm honestly curious though, why do you think this isn't rape but still ethically bankrupt?

Do you believe being blackout drunk Impairs decision making?

Would you sign a contract while blackout drunk?

What about make large investments?

You probably wouldn't do anything important while drunk, because you know it affects your decision making and ability to consent.

Are you saying that if it weren't for "bogus rape allegations" you'd be out there taking advantage of people even though in your own words it's unethical?

If so your extremely unethical in your own words.