I'm not asking whether it's worth it for the money. OP said "for a job with reasonable hours, hft pays a lot". That suggests they think 10 hours a day is reasonable, independently of the salary.
I don't think it suggests anything other than 10 hours being reasonable when you're paid $400k. Why would it be a separate thing? Everything hinges on the money. It's not reasonable to work 10 hours a day for $40k, but that's very much not the case for $400k.
