I find it interesting that the word Hobby and Improv for those that do it for a living seems to have negative connotations when put together. As a mindset I think it's pretty valuable. Hobbies are meant to be enjoyed, it brings pleasure and relaxation. Although by definition it's not meant to be an occupation I don't think it's wrong to be grateful when you can make a hobby your job. Who wouldn't want that?
Two thoughts that worry me, as a person that is very thankful to have had the opportunity to work professionally in something they love, would be that people may treat it less as a hobby (fun and relaxing) and instead make it stressful and essentially "work," which I have been guilty of. The other thought that I like to dwell on from time to time is the mindset of a true hobbyist. They are fanatic and completely dedicated to their hobbies, they spend time and money on truly being good at it, it's self-learned, well-studied, and there's a lot of love and passion for the "hobby". That is awesome, but maybe not as awesome as a toy horse (which is still definition number two).