“employees can get ground down in low-paying, demanding roles”, such as Fed Ex drivers, young lawyers, adjunct teachers, and lumber mill workers.
I forgot to mention law firms. Its similar there. I know because though I don’t practice (now) I am a lawyer and did that back in the 90s. 80-85 hour work weeks were not uncommon - and it ain’t like the pay was great.
Very few last more than 2-3 years. I didn’t, went to grad school for business.