I grew up in the business. I was taught much by a deeply dedicate photographic family. I can tell you that although business savvy is important, the final result is also important. The skill of the photographer and printer is worth more than ten percent you seem to think it is. People came to us because were better than the rest and we had experience and mad skills.
1. What part of photography skill filed the business documents?
2. What part found business insurance?
3. What part picked a business location?
4. What part negotiated the lease?
5. What part managed the account?
6. What part handled customer service?
7. What part handled marketing?
8. What part prepared the taxes?
9. What part calculated overhead?
10. What part took the picture?
Look at that, 9 out of 10 business items have absolutely nothing to do with photography, making it only 10% of the big picture. You can't negotiate a shop lease with knowledge of ISO or Shutter Speed. LOL.
Sure your pictures kept them coming back, but the business savvy is what kept your business from going away. Food for thought.