Try to convince me to not to do UPS?

I’ve worked as a helper this peak for about a month, every driver and route I’ve been on has been great reviews and good work done. The drivers all advise I get in the hub as a handler and to go full time, it’s very convincing. I’m also well liked in the hub according to drivers. I’ve decided to get in the hub after peak.

I see post where they say this job isn’t so “work and retire and be happy forever” as they make it seem and honestly, it really does look that way. Anything worth having is gonna require work so don’t tell me the work is hard, I can make work easy, what really could be the downside of going through this journey?