Working hard at random jobs isn't the same thing as getting on stage 8+ times a week to perform the same show over and over again. I fully buy that she had no idea what she was getting herself into when she went for a role in a medium she had previously reviled and knew very little about.

I really can't with people so determined to pretend Rachel was the only
one in the wrong with the start of that fight. In 5.09, Rachel tries to
be a good friend and invites Santana to get pampered to make up for the
fact that she's feeling low because she has a lifetime supply of yeast
infection meds and not much…