When I was much younger I used to everything myself, not because I
wanted to, but because I
had to. I was fortunate that my Dad had been a plumber and was very handy at all sorts of stuff andn had passed on his "how to's", and I was an apprentice-trained mechanical engineer. So not much put me off. The big ends went on my Triumph 1300, so it was engine out time (nearly brought down my uncle's garage when I missed a bolt fastening the block to the subframe). Did a decoke while the block was away for welding and re-machining. I've done the lot, boilers, washing machines, just about every part of the car, all decorating and plumbing. But as I grew older and progressed in my career, I had more money, but less free time. Gradually, I started to pay people to do the unpleasant stuff for me. By the time I got into mtb, I was already retired, so I had more free time but I had lost the inclination to do the "difficult" stuff. On my mtb I have done everything except suspension servicing. On my emtb you can add in anything to do with the electrics. Along the way I have accumulated a lot of tools, most of which no longer get any use!
I know I could do it, just don't want to!