no way. uh-uh. nope.
first, there are tons of painters who were never appreciated until after they died. inherent in this statement is that their art was wholly finished (and therefore as valid as it was going to get) prior to them being a commercial success.
2nd: to me, valid art means that the artist has connected with the audience. this precedes any commercial transaction whatsoever.
and lastly: of course not. look at us. we're pretty valid. when i am moved by something on action poetry, it is valid (to me, the audience).
i think the next question i will post up top.