"Cuz then I’d argue why is sexual predation possible in our prison system? Isn’t this something we could largely avoid?"

Apparently not. We would need three shifts of guards for each prisoner. This isn't achievable, nor is it practical.

It would be much easier to keep prisoners in facilities that correspond to their biological sex. Problem solved.

"Starting with decriminalizing all drugs?"

Oh, good idea. While, yes, that would relieve prison congestion somewhat, not everyone is in prison on drug offenses. And yes marijuana should be decriminalized and we are moving rapidly in that direction. But I don't see trading prison congestion for a national addiction crisis to be so great an idea.