In fact, the US is listed on Wikipedia under the Labor Camp article alongside Russian gulags [1] and has a whole index of its forced-labor camps [2].

[1] https://en.wikipedia.org/wiki/Labor_camp

[2] https://en.wikipedia.org/wiki/Prison_farm

> how many are there who didn't make a choice to do something knowingly illegal

Not that this is a valid point anyway, but not none.

https://www.law.umich.edu/special/exoneration/Pages/Exonerat...

> None of the prisons I have toured have anyone working who doesn't want too

Your anecdote is not data. Forced labor absolutely exists in US prisons.