At my last job, there were people who were shocked that I replaced the latches on my cabinets myself and fixed the toilet without calling a plumber. A lot of people probably wouldn't know where to begin without an expert.
Broken cabinet? Gotta call the landlord; If I tried fixing it myself I'd technically be breaking my lease.
I know americans renting stuff in Germany have been surprised they're supposed to bring everything including their own kitchen.
So there's up and downsides to both approaches (fixing your own stuff vs. having to bring it in the first place.).
For things you don't own (broken window, toilet, etc.), not fixing them yourself may be important though because your landlord is supposed to foot the bill.
In my experience GP's comment stands: if you start fixing shit that isn't yours, you're in violation of most residential leases.
Time is at a premium which makes gaining more knowledge, skills, and physical aptitudes outside of your paid labors a luxury. Perhaps if people were working a 30 hour week and making enough to sustain themselves they would have more time to have such hobbys and ambitions, but most jobs that pay enough to thrive off 30 paid hours a week require far more than just 30 hours a week of work to stay employed. And most jobs that do have people working only 30 hours a week usually don't pay enough to comfortably sustain somebody.
I have a pretty fixed amount of freetime in the evening, but good luck doing carpentry or masonry at 8pm to any purpose (I mean, you could probably sound insulate a room enough to enable it as a hobby, but you won't be fixing up your house yourself).
I say this having been raised by a loving immigrant dad who was forever tinkering in the garage. We had the worst of both worlds; we were reluctant to ever hire a professional because Dad could fix it, and Dad had an ever-growing list of things to fix, and less energy to fix them as the years piled on. He left us with two half-fixed cars, a half-finished shed, a jury-rigged pump system for rainy season, and an overgrown yard.
It's ok to have somebody else mow the lawn.
It's true until it's not. Many well-off people were trying to cut all kinds of costs after their pay got cut or jobs lost during the Great Recession. Quite a few people down here were saving money hunting deer, raising chickens, fixing their own cars/homes, etc. Some of these skills can be good to have just in case.