Sei kein Gefangener deiner eigenen Gedanken!
All of the significant art of today stems from Conceptual art. This includes the art of installation, political, feminist and socially directed art.
Also, since art is a vehicle for the transmission of ideas through form, the reproduction of the form only reinforces the concept. It is the idea that is being reproduced. Anyone who understands the work of art owns it. We all own the Mona Lisa.
When artists make art, they shouldn't question whether it is permissible to do one thing or another.
Unless you're involved with thinking about what you're doing, you end up doing the same thing over and over, and that becomes tedious and, in the end, defeating.