It drives my wife INSANE that... I have nice brand new pair of shoes from 5 years ago I never ever wear, because I refuse to put wear on them and instead use the cheap shoes from 8 years ago. Same with shirts and sweaters - the nice ones she bought me over last few years are waiting in the closet until my old shirts and sweaters die - and some are getting close to 20yo.
Nothing wrong with it, as such. But it's not always rational behaviour either - more of a left-over compulsion from leaner time (I come from eastern europe and then 2 years of civil war).
As for people repairing anything - much as I love his writing, I disagree with Heinlein's "specialization is for insects". I can help a friend with computer or fix our network. There's weird things I can do like watches and whatnots. There's any number of things I can do well. But I'm probably better off doing the thing I do well, getting paid for it, and then in turn paying plumber or electrician or mechanic for things they do well.
If fixing a car or your washing machine makes sense or is your hobby / pasttime, brilliant. But sometimes it doesn't, and it's OK to keep the circle of life/economy going :).