IP is obviously not "real" like physical property is real. Moreso, IP is a restriction on free speech as it walls off some expression as "Copyrighted" so you can't legally express it yourself without paying someone for the privilege.

That's not to say that IP is useless, but treating IP infringement as "stealing" was always a problematic shorthand. Previously, calling IP infingement "stealing" was the domain of corporate interest groups like the RIAA or MPAA, but with AI the winds have turned and supposed anti-corporate lefties are keen to treat IP infringement as theft to attack AI companies. There's very little intellectual consistency on either side of aisle here.

It's actually worse than that. IP laws trump property laws because they prevent you from using your property in ways you would otherwise be able to. It's nothing more than base rent seeking.