[keiferski]

Both of your examples are about social / public acceptability of the artist as a person, not the evaluation of their artwork itself. Of course most people would be uncomfortable associating with such a person, but I don’t think that’s inherently relevant to their work.

Nowadays we are in a marketing-focused era where serious aesthetic thought is basically unknown to everyone but academics, so the natural result is that the identity of an artist is often more important than their work.

(Side note: performance art refers to a separate art field, e.g. Marina Abramović. Performing arts is the right term to use for music, singing, etc.)

But yes, of course there are various approaches to aesthetics and certainly some would say that the artist as individual plays more of a role in some genres than others.