A question about Yoko Ono as an artist?

Whenever you look Yoko Ono up she is described as "best known for having been married to john Lennon" even though she has been a widow for over thirty years. She is an artist in that she works as one from time to time, the words avant-guarde tend to be used in describing that work..which is usually a polite way of saying that somebody might like it in a century or two.But no, placing urine in jars is not art. It is done by people who suffer from very extreme forms of agoraphobia and other conditions and has nothing to do with self-expression, I have a few of heights but I would never claim to be an artist just because I keep my feet off ladders and steep slopes. To be fair, however, I do not think that the ability to pickle a sheep is art either..and there is no denying that Yoko Ono lacks barriers.