Q: I would be inclined to believe that it isn't, but I have heard many people say that it's "cheap" or "shallow" to do so; especially in mediums like music.
A: hm, i think that only happens when the artist may be perceived as being too eager to bring that particular subject to market. not just do art but go public with it / sell it, at its most trendible moment. which is not quite how i interpreted your initial question