Man that's some serious goal post moving happening on this thread. We go from land superficy to land ownership - with a little sprinkle of "muh racism" because why not.

Is it about land superficy or about ownership? Can we establish a clear framework here instead of constantly jumping from one wishy washy thing to the other?

You aren't the sole owner of your house either. Even without a mortgage you are not. So if someone adhere to the social contract in your house I assume you let them in to do as they please (within the limit of the contract of course.)