property in that you have a piece of paper saying something is yours and you can prevent people from using that thing or extract value from it, while not using it yourself. That’s theft.
But possession, ie. having things that you use, a house you live in etc. that’s not theft unless other circumstances that lead to the possession are theft.
It's all about terminology. I like the concept of usofruct where your right to own something is bound to either use it directly or collect its fruits (in a literal or figurative sense). So a landlord wouldn't own a house but the people living there would. This has it's roots in Roman law where ownership had three aspects: usus, fructus and abusus (misuse, destroy, ...)
Because you have to literally force people on social media to look up what a phrase means. And if you link to Wikipedia, they will act as if they already knew, or tell you how Wikipedia is leftist drivel.