If that is the case then the people working should be compensated real wages for the work (in trust accounts, donated to charity or their victims, or whatever) or no one should profit by their labor in the way that it's being done. Their work pays them pennies while their 'administrators' make huge margins because of the low wages.

Just because working is better than sitting around it doesn't mean their work can be justifiably exploited for profit against their meaningful consent. They have very little choice in how to alleviate boredom.

It's like saying people in comas are unconscious so why not use them as prostitutes, they're lying down anyway? Well, no, they're still people. Prisoners are still people too. We should not fuck them, or fuck them and claim that it's justifiable.