It's not just your circadian rhythm being fkd. It's your regular, overall sleep pattern. Constant interruptions because civilized life goes on during day hours. Need to go to a bank? Have a plumber over to fix a leak? Go to see a doctor, ironically for sleep issues? Gonna lose sleep to make those "sacrifices."

For those who have never worked shift, it's like getting up at 3am to go see your kids basketball game, then go to work at 8am.

Source: Worked shift for many many years.