Express driver certainly would have a hard time with ups workload. Ground guys probably move a similar amount of packages. The difference is mindset. A ground guy will see a truck with 7 hours of work and find a way to get it done in 5 since he’s paid the same. A teamster will see 7 hours of work and find a way to turn it into 12 so he can make more money and hurt his employer as much as possible. Most Ground guys wouldn’t be happy putting in 12 hours.
No way I could work around people with the mindset of a teamster. There’s countless threads on the UPS side saying this exact thing, everyone over there tells each other to slow down as much as possible. Work slowly, grieve everything, blah blah. It’s what their pay system incentivizes.