In what niche does art fit?

The guide to narrow down the niche has three main topics: health, wealth and relationships. I see that these are the topics on which peple need the most help and are really willing to invest.
Now I‘m an illustrator/designer and I can create art or teach and these do not fit into any of these three main niches. Unless I‘d teach a somekind of class on beeing a sucsessfull (wealthy) artist/illustrator/designer…wich I am not (yet..) hence I can not teach that.
Am I missing something or do I need to really rethink my niche.