Sounds great, doesn't it? An army of people supplying you with the best bikes in the world and the best tracks in the world to ride them on. The reality is a bit less glamorous. Sure, it's nice work if you can get it, but there are prices to pay.
Travel, and not vacation travel. Needing to win or at least place well consistently to keep that income rolling. Riding ALL the time. I could go on.
One of my friends from decades past actually hit the big time with a famous group. You all have heard of the group and the gentleman. Ask him about raking in megabucks with thousands of adoring fans at venue after venue. Many are the times when he wished he could be in a "normal" job without all the hassles, pressures and craziness.
The grass is always greener.