God, that sniffy English interviewer is awful. Doesn't even let the man finish a sentence without interrupting him to try and insert some poncy self-righteous moral homily.
Harlan Ellison said something interesting about flawed artists, too, and he was very much one himself. He said regarding artists through a sanctimonious prism is a mean-spirited practice, because it's never used to say well, this artist lived a potentially painful, miserable, disgusting, horrible life, but nobody ever remarks upon how inspiring it is that some beautiful or awe-inspiring or thought-provoking art came out of such a troubled soul. And that is true.
The question of it maybe not being right to enjoy the art of a flawed artist, in an interview, or in any setting, is just a way for the interviewer to try and flaunt their own supposed moral superiority to some artist whose views or art don't coincide with their own tastes. It's absolutely fake. And disgusting, quite frankly.