OP said "corporate". A person and a company are two separate things (even though they get problematically conflated in the concept of "corporation").

Calling citizenship outdated is a fashionable idea for the class of people who can cherry pick their prefered work-, investment- and tax environment.

In the old days an individual would have some sort of responsibility towards the community, including the effect of house ownership as described by OP. Another outdated concept?

You’re right about being able to own homes.

Citizenship, though, is a critical concept for how countries function. It has a bearing on taxes, benefits, voting, etc.

Without citizenship every one of those are up for massive abuse.