He didn’t say “sole purpose”, he said “main job” in the context of what the typical lowest common denominator parent these days expects first from a school just so they can go to work. “Main job” implies there are other jobs teachers do that those same parents don’t consider as important as just keeping their kids busy so they can work. Perhaps you should read the post more carefully to avoid arguing against something that wasn’t argued in the first place.
He didn’t say “sole purpose”, he said “main job” in the context of what the typical lowest common denominator parent these days expects first from a school just so they can go to work. “Main job” implies there are other jobs teachers do that those same parents don’t consider as important as just keeping their kids busy so they can work. Perhaps you should read the post more carefully to avoid arguing against something that wasn’t argued in the first place.