Oh yes it does.

We’ve increased the available supply of drinking water overall.

And then you charge up the wazoo for a basic human right.

On the other hand when you live in a city where there is a limited supply of housing and you buy that up and rent it back to people at a profit so that you don’t have to work, you are simply draining the system of resources.

Ah. It would appear you believe that somehow buying a property and renting it out does not require financial risk and effort like any other product or service. Renting out housing, despite frequent appearances, requires maintenance and expenses in order to reap a profit. What you are describing would more accurately describe investments in stocks or bonds which do not require anything but capital on your part.

" economists literally use the term ‘rent-seeking’ to describe behaviour"

Except those same economists argue that renting out housing is productive. And that’s not in fact the origin of the term. The classic example, according to the wikipedia is charging money for boats to pass a section of river. The term does not refer to housing, which requires a reciprocal exchange - you build or buy the house and maintain it and in exchange you are paid for it’s use.

To repeat because I have to: I’m not arguing this is good. I’m arguing that a distinction between types of capital investment cannot be made. You can say landlords are universally bad but other types of capitalists are good, universally or otherwise. It’s the same damned thing.