I really hate to burst your bubble, but I am technically a landlord. I own a duplex, I rent out the other half to my brother and fiance, and we're all paying the same amount into the mortgage, but for all legal purposes I'm their landlord.
In my experience as a renter and a landlord, if we're talking about the convenience factor, it's still easier to be a landlord.
That "one phone call to fix a thing", assuming they bother to actually fix it, is one phone call for a landlord to just get some guy to do it. So that's the same amount of effort.
Landlords usually have to put in even less effort, because there's entire companies who's job it is to be property management, so most don't have to even make one phone call to fix anything.
As someone who owns a home now, it's less of a pain than renting. I have been putting work into the house to change it because I can and don't need permission from a landlord to do so. If something is broken I can have someone fix it without having to go through a landlord to decide whether or not to call someone.
So yeah, if there wasn't a homelessness problem and everyone had a house, and some people didn't want to bother with it, maybe I could see in that world a landlord existing like a hotel service or property manager for individuals, but when people are dying in the streets because some greedy corporations and selfish assholes keep all the housing and extort everyone who wants shelter, that's fucked up.
People's problem with landlords isn't about personal convenience, and you should maybe look beyond yourself. It doesn't matter if you find it more personally convenient, it's part of a problem that's killing people, and if you're still cool with that because you think it's slightly easier for you personally, you're a selfish, horrible person.