There is indeed a case to be made for universal access to basic necessities but the case against rent extraction is more basic than that.
To your point about people preferring renting to owning who have the option of both, I am not directing my argument against this case but the general case instead - most people do not have the option of affording housing except through the rentier capitalist avenues of rent or mortgage. It is these people who are being parasitized by this form of economic activity.