I opened one of the early stores waaaaay back in 2001. Went through some great training, traveled to Cupertino, and spent a couple of years as a Mac Genius, and left the store before iPhones came along
For a while it was good, but eventually the customers got entitled and abusive. I had people screaming at me all day for some imaginary issue with iPods, or refusing to accept that beer spilled in a laptop wasn’t a manufacturer's defect, or that the thousands of downloaded porn images on the desktop “just happened”
I still have low level PTSD from the experience. I have friends who stayed longer, and were broken by the increasingly bad conditions
I’d never do it again