It’s fine if you like banksys art, i do too, we have a saying that “you can get away with things as long as you keep it clean”. (Poorly translated)

If the owner or rightsholder of the property he defaced/vandalised/painted on, decides to restore it, sell it, keep it, whatever. That’s entirely up to them. Always was.

There’s no “dynamic”, he wants to make a statement, so he goes out and vandalises a piece of property to amass attention. In theory, it’s no different than the “just stop oil” people trying to throw paint at the Mona lisa or some random stores windows. Vandalism is vandalism.

Ofc he also produces art that isn’t vandalism. But he rose to fame for his vandalism. I think it’s with keeping in mind.