I remember years ago while still in college when a student that was retired taking a photography class. She was in the lab taking scissors cutting her 4x5 negatives in half from a photo trip in the American Southwest. I was horrified and asked her why. She said "They weren't sharp". She puts a loupe on each neg to see if they're "tack" sharp. She's a great admirer of Ansel Adams and a f/64 practitioner. In my opinion, she's too rigid in her view on what is good shot. To me sharpness is just another creative tool like lighting. I don't use it all the time. It depends on what I shoot.