There is no crime where torture is an acceptable punishment.
There is no crime where sexual assault is an acceptable punishment.
There is no crime where slavery is an acceptable punishment.
"Well obviously people arrested for drugs and other non-violent crimes shouldn't be forced to work but—"
No! There is no but!! There is nothing in the world that makes slavery okay!!!
I could talk about people being charged for crimes they didn't commit. I could talk about coerced confessions. I could talk about people being charged with more extreme crimes than what they did to fill prisons. I could talk about how slaves out of certain types of criminals creates an incentive to charge more people with certain crimes.
But I'm not going to actually talk about any of that because it doesn't matter. No one should be enslaved. No one should be defending or justifying slavery. This should not be controversial.
I agree with your point, but I want to add more:
There is no crime where medical experimentation is an acceptable punishment.
I've seen way too many people argue that we should test the COVID vaccines on prisoners and as a Jewish scientist, I cannot tell you how revolting that concept is.