Comment: I think the main

I think the main justification for public schools is for children from low-income / underprivlidged households whos parents are not capable of teaching or providing for their childrens education.

Ultimately the system does not serve even these people very well. I do believe even these people would be better off without public schools. Not in the short term though. It would take time for voluntary systems to develop to fill this need and the chaos that people would raise in the interim would be so intense I cannot imagine it would happen before total collapse.