Illegitimate artists

In the video featured on ABC's news report 'Is it a bird? Is it a plane? No, its a Skywhale', Centenary of Canberra creative director Robyn Archer says:

As far as I can tell, it's probably the first time in the world that an artist has been commissioned to make a balloon; a legitimate, genuine artist.

Now, there is good art and bad art, there's dilettante art and professional art, but is there such a thing as legitimate and illegitimate art?

There is genuine art but are there genuine artists?

Robyn Archer has been in the art world for too long to not know how to speak about the topic.