Theres a lot of psychology that goes into schedules like that that I feel goes (deliberately?) Underresearched/underrepresented or something.

When I was working 5 days 8 hour shifts with weekends off, I was phoning in sick every time I could afford it, and would refuse Saturday shifts every time unless I was desperate for the money.

When I was working 3 on 3 off 12 hour shifts, I often ended up working 21 days straight accepting all the overtime. The fact that the next “weekend” was never more than 3 days away really made the work tolerable.