Same problem, arguably far worse. Consider reading Imperialism, the Highest Stage of Capitalism. Banks play a huge part in the dominance of Financial Capital.
Rent seeking does create value: it provides a place to live. That is tangible value. There is no “one time labor” in this equation. The landlord continually pays taxes, insurance, maintenance, and other regular outgoings regardless of whether he bought the house outright or not.
The tenants literally pay the taxes, insurance and maintenance in their rent payment. When any of these inflates, so does the rent unless there are protections in place.
So being a landlord means someone else pays the mortgage for your unit.
The only thing that could be seen as a service are short term rental, and even then, it was abused to death by the AirBnB/VRBO and any other short term rental service.
Rent seeking is the most capitalistic thing someone can do : you use your money to get someone else to pay your rent. You do the minimal maintenance that you can get away with, and when you actually do real maintenance, your tenants get a rent hike.
If there weren’t any landlord, there would still be housing. But a lot more people would own the place they live in, at a reasonable price, instead of housing being used as an investment vehicule.