I do in fact say so.Yes I disagree.
It's not even an argument. It's pretty much the equivalent of saying 'Because I said so'
And that is indeed plenty enough, given the circunstances. Why waste energies?
He didn't have sex with them, He was raped.
By the same daughters that survived the destruction of their city, presumably because they were worth of survival, while even their mother was punished with death for sins that, to the extent that they even clear to exist, include a willingness to rape Lot's visitors.
That is a very confused morality at best. And, again, that is before even considering their motivation of ethnic "purity".