I've been tinkering with my bikes ever since the Schwinn Racer I got for my 12th birthday. I've always liked it and for me the fixing/overhauling/maintaining is just another facet of the hobby. Lots of the folks I ride with have no desire to pick up a tool. Sometimes I do it for them, most of the time, they use their favorite LBS. But, I'll guarantee they have at least as much fun and get every bit of the enjoyment out of their bikes as I do mine.
I like stargazing too, but if anything goes wrong with my telescope, (like the stinking motor drive - again
), I ain't touchin' it. No interest, no skill for it, and would rather pay to get it fixed.