Well said. There are substantial business related activities related to the product/hobby that you may not love to do.

I used to worked part-time in a ballet school. My boss and her business partner are highly trained ballet dancers. On top of teaching the classes, they do marketing, bookkeeping, dealing with difficult students/parents, hiring and cleaning in the very early days of the school. After the business took off, my boss hired administrative help so that she could take on more students.