I don't think taxes negate ownership.
If you rent you need permission for every modification, every pet, even for something like planting a garden.
Ownership can be conditional; you can own a domain, but if you don't pay the renewal fee it can be taken away; you can own a car, but if you drive it without paying your registration it can be impounded; you can own a business, but if you don't pay your license renewal it can be revoked.
Owning something doesn't mean it can never be taken away or that you don't need to do anything to keep it.
It's not meaningless, it's about who controls a thing. What makes you think ownership must not have conditions?