> the majority of its prisoners did not do anything morally wrong
Are you suggesting that the prisoners who did nothing morally wrong are the ones convicted of drug-related offenses?
Honestly, while the fraction is large, it hardly looks like a majority (1 in 5 apparently):
https://www.prisonpolicy.org/reports/pie2020.html
And it is not broken down to users vs dealers. The former may have a claim to having done nothing morally wrong, but the latter certainly do not.
> Most of them didn't even go to trial
This is arguably a problem, but not unique to the US. Other places also do a majority of convictions via plea bargain:
https://www.economist.com/international/2017/11/09/the-troub...