My wife's a pretty good family photographer (i.e. doesn't do it professionally) and she used to get the same.
I bet nobody goes up to authors and says "Great book - what pen did you use?"
I bet nobody goes up to authors and says "Great book - what pen did you use?"
https://www.tagari.com/is-stephen-king-still-typing-away-on-...
The process of designing an image isn't. So if you were an art director in a studio in charge of the look of the model, hair, makeup, etc, nobody will question your credentials, but if you were the photographer hired to simply take the photo, then you're merely an operator of an instrument, not someone with a creative vision.