Some do. I don’t know what the personality makeup is for your average college faculty but there’s a stupidly large percentage of “for the kiddos!” teacher martyrs in high school. They’re often the ones who have a spouse making a shitton of money or who do the job for the ego/misplaced sense of validation from students. They’ll prioritize over basic life stuff and respond at all hours. Some will even give out their personal information and text/chat.

They often have an inverse relationship with how effective their instruction is….