When I judge art or music (or dance or poetry or…) for myself, I can rely on the “Does this speak to me?” test. If I had to justify going somewhere to play music that nobody wants to hear, and losing money in addition, I would be able to do that. I usually have a reason, sometimes many reasons, to go somewhere to play.
If I had to justify the music I played at that venue, I would have a harder time. I might talk about my artistic intent, or throw some other shady BS out there. The truth is I play it because I like it. I like the way it sounds, it means something to me, it feels good.
If I go somewhere to play something I wouldn’t play on my own, it’s because I am getting paid. I sometimes get paid to play something that I WOULD play on my own, in which case I will have a good time. If not, at least I will eat that day. My justification, if asked, would be “I am getting paid to do this.”
I don’t know if the guy who made the fecal bathtub had some intent other than “making a statement”. And perhaps making some money…. The fact that he sued the gallery, rather than just repairing the installation (seems like it would be easy to do), indicates to me that he was more concerned with making money than making a statement. Which in turn makes it fail my “Speak to me” test.
All that to make my point - if the intent of the artist is to communicate something, no matter what, then I don’t think it needs any justification. Speech, in all its forms, is a sacred concept to me. I may or may not like the content, but it’s still part of the human record. But if the artist/performer is merely trying to get rich, then no justification is going to make me respect or appreciate that effort.
I do believe that artists should be paid for their work. Speech has value. More importantly, art in any form is important for the well-being of humanity. But creating content solely to “cash in” is dishonest, and I use my internal BS meter to detect that.