Of course, but that work could be provided by anyone.
It absolutely could… Any case of a resource being turned into a utility could be done by anyone. The point here is in capitalism the people whoa re most effective at converting resources to utilities are the ones who get assigned those abilities through the free-market pressures that drive it.
If a tenant were as good or better than the landlord at driving utility then in a healthy capitalism they would be a home owner and not a renter, thats the whole point.
A tenants’ union
Nothing stopping such an entity from existing in a capitalist government. The key is such an entity will only exist (for long) if they can provide such a utility better than everyone else.
It takes no special skill and neither does it require ownership of the building.
It absolutely does take special skill. Evaluating the quality of a managerial service and who you defer such services to is very much a skill. Pick a bad service and you loose everything (as you provided bad utility), pick a good one and you thrive. You also need to be ready to switch services should your current service decline in quality.
The only reason it’s the owner who gets to do that job is that they’re legally entitled to.
No that isnt the only reason. They are legally entitled to and provides the best utility in doing it. If they were only legally entitled to but didnt provide good utility they would pick a poor service and have lost their property as a result, which would mean a newer better landlord would take their place that can provide that utility better.