What i mean is....
Imagine you're a surgeon and the night before major surgery you get ZERO sleep. How the hell are yiu supposed to cope the next day?!
Or imagine you're a barrister with a massive case you're representing and you're just about to go into court, but you just found out your partner died.
I work but its a low-stakes profession, I do everything in my power to not have an off day, but if I do, its not the end of the world.
I think i would be a complete mess in the situations described above.