How many of those days and hours were spent inside an air conditioned room with a bathroom and, probably, a kitchen/cafeteria?
I work in engineering for construction - when we were building Bertha's rescue shaft in Seattle the crews worked 5 months straight drilling holes and placing concrete with two crews on 12 hour shifts with only July 4 and Memorial Day off. When we excavated the shaft and repaired the machine we switched to three 8s and ran for almost another year.
Rain or shine, hot or cold, day or night. We worked that job every day. Nobody left until we switched to 8s because guys wanted to work 10s on another job - that's just blue collar work. In fact, that's the type of blue collar work that guys want because the OT pays the bills so you're right about that. The management on the project? Worked 1.5x as many hours as the crew because they would normally cover a shift and a transition. Every one salaried. Nobody left.
What the tech industry complains about for working conditions makes me laugh.