I too always thought a teacher’s job is so much harder than people think, so much work goes on at home at evenings and weekends.
Outside of senior leadership I don’t know a teacher who works every evening, even in the current situation. The teachers I know work very hard during what would be a for most people a normal working day (ie between 8.30-5.30), and not at weekends, I know some secondary teachers who take time off during the day during free periods to be available later for their students working at home in the evenings. I don’t know any who do substantial work over the holidays, beyond checking emails and setting up classes the day before school returns. Out of the head teachers I know, most do a lot of work in evenings and weekends, which is commensurate with other management roles in the public sector.
Teachers work hard in a demanding job, so do nurses, police officers, social workers etc.
A lot of people go home and maybe do the odd bit of work, check emails etc but don’t do work nearly every evening
You’ve clearly never worked in a child protection team, or in crisis teams in mental health services, or in any role working with vulnerable people. Not just checking a few emails, but sitting with a child until an emergency placement can be found, or wasting with someone in crisis until they’re safe to be left, or writing assessments because it needs done.
Lots of professions work very hard, with long hours in emotionally demanding jobs, with high levels of scrutiny and accountability, and high levels of very public criticism.