Making a living at cycling is something more could do if they wanted to. This is something that you decide before you are old enough to legally drink, not a mid-20s. I knew a few of kids that could have been WT pros and didn't want to, and a few that are. Listen to Phil Gaimon videos and you can get his perspective.. Those deciding they maybe could and those deciding not to are different.
Jobs are pretty much jobs. If you are the best at it, it is a pretty good job. If you are like the other few hundred chasing it, it may not be so much fun, unless of course you are paid millions for the journey such as in the big sports.
I understand being a pro is hard. That does not make it such a good life decision, even if you can do it.