I guess for people who are comfortable forever being tenants, it could work pretty well. Certainly there is a class of people who are comfortable being the landlord.
To be fair, though, you can buy insurance for those unpredictable costs.
(EDIT: I guess that to the extent that you live in a multi-story rental building, you and other renters above and below you share the costs of the single roof above you. But that's, first, not the major cost of home ownership, second, not applicable to all renting, and third, probably a small enough savings that it's eaten up by profits to your landlord and the costs of maintaining a super.)
While it's less obvious with housing the same applies: People buy houses that are bigger than they need at any given moment so that they have the space they need to entertain guests, or house prospective (or past) children, etc. It's much cheaper for me to put my parents up in a hotel when they come to town, than to keep a guest room idle for the next 20 years of my mortgage.
(And in fact you pay for more wear on tires, gas/electricity, and other per-mile costs with rideshare, because the car travels more on your behalf than would a car you own.)
How much house you want/need is a valid concern, but not one that really cuts towards the question of renting or owning your primary residence. You can buy a house without a guest room. I did!
Yes: rented stuff is generally more expensive in expectation - you're paying for LandLord2.0's marketing department.
No: you own a home and the roof leaks - good luck getting the insurance to see to it promptly, even after half a dozen phone calls.
If you are truly time poor and cash rich I suppose it could make sense to rent most things.
There's definitely a case for "paying money to make other people handle shit instead of you." There are lots and lots and lots and lots of opportunities to do this. You can go to a restaurant instead of cooking. You can have food delivered instead of going to a restaurant! You can hire a driver, whether it's through an Uber or through paying the salary of a personal chauffeur. You can hire maids, whether directly or by staying at a hotel. But, again, I don't think this really is that closely related to renting versus buying.
Sometimes what you can get in rent is less than what it costs to maintain a property, but it’s still better than letting it remain empty. Assuming the owner is even that financially disciplined. And again, sometimes people just don’t understand the finances.
Sometimes the rent people can charge is far higher than the cost to maintain property. But that doesn’t mean the owner is selling or that the renter is in a position to buy.
One is not categorically better than the other in all situations.