Because it's normal, that , let's stay with photography especially, extensive know- how needs time, practical knowledge, exercise, a lot of understanding of the technical side.
You've studied it - I taught it myself, as a hobby, just taking part on workshops here and there for Smartphone photography with photography groups or at Leica (the also offer courses sometimes).
For me it's my greatest hobby - for you professional with years of experiences.
I'm satisfied with my actual results, ok I'm good.
But it's always an aspiration to improve better over time.
