Child labor was frowned upon because the future potential of education far exceeded potential when doing manual labor.
With the severe lack of trade skill workforce and higher paying potential, access to free education from anywhere, AI taking over knowledge work, shouldn't we all going back and thinking this from first principles instead of parroting "Child Labor Bad".
If I were a teenager now and love to do manual work and get compensated for it, I better not have arm chair elitists prevent my ability to do so.
There is also no study that proves Child labor (15+) harms development over long run.