Yeah, I wouldn't point the finger at any of the things you mentioned. None of them intrinsically qualify as 'rent-seeking'.

It's more the whole system has changed to reward rent-seeking. So you can be rewarded for owning shares in rent-seeking companies, you can be rewarded with capital gains in a housing market where everything is done to prevent the house market undergoing corrections, etc. etc. Nothing wrong with owning shares or getting capital gains on a house, per se.

Edit : that hasn't answered your second comment on what are actual examples of extracting rent, sorry. Bit too tired now to give a proper answer to that one.