As for welders, who you keep bringing up.
I said on an earlier post that my partner is a steel worker. His work is physically hard, dirty and tiring. He works from 7am-3pm. When he finishes at 3, he doesn't give it a second thought until the following day. He's tired, yes but he said he'd never seen 'exhaustion' until he met me. If he didn't cook every evening, there would be days when I wouldn't eat because I'm so tired. He goes out a couple of evenings a week with friends who do similarly difficult manual jobs. I go to bed around 8.30 after falling asleep on the sofa. Some days, I can't string a sentence together by the time I get home. During term time, my life is working and sleeping. The 'holidays' just mean I get to wfh on my own schedule.
Through him, I know a lot of tradies/manual workers. One of our friends is a carpet fitter. He's in his 40s and his knees are shot. I believe him. I don't question it because I've never been a carpet fitter. One is a TIG welder (I think it is, it's the harder, bigger, heavier welding). So I have real life people and not my imagination to compare it to.
I've talked to several teachers who've left teaching. They've all said they wondered how they'd cope without the 'long holidays' and, without exception, all of them have said that they don't need them in the same way in their new (mainly) corportate/civil service roles. They've said they get tired, there are pressures, deadlines and stresses but they never feel they are running on empty or on their knees. Many took a paycut when leaving teaching. Some quite significantly so, but they also say it has been worth it for the benefits to their physical and mental health.
I can't comment because I'm still in teaching.