IME many higher end riders can't be bothered to do their own work..they have the cash and have better things to do with their time.
I'm not a high end rider, but I am attracted to shiny things and dedicated to keeping the economy going, so I ride a high end bike. I don't have better things to do with my time, but while I'm slowly learning to work on my bike, I'm still paranoid about doing something wrong and either doing damage or finding myself without some component at a critical moment. Fortunately I have memorable bikes and competent shop guys who like to fondle my Ellsworths almost as much as I do. Unfortunately I may have some expensive decisions to make eventually as they're having trouble finding - I think it was seals - for the fork on my Dare.
Anyway, I *do* want to learn to work on my bike. My shop offers the opportunity, over the winter, to have a shop guy work with you on your particular bike to learn how to do - well, anything you want. But my winters are a bit occupied, you know? Maybe this December would be a good time ...
And in my favor, the attraction to shiny things extends to tools, so I do have a lot of what's needed in the garage. And the air compressor is handy for tubeless tires. Still getting the hang of that one.