There is good practice and there is not so good practice and there is bad practice.
You are developing a language for yourself to write with plastic means that can represent the experience of the world.
You are not developing a language to write with plastic means that can represent the experience of looking at photographs.
I'm talking about developing a LANGUAGE for yourself, not the business of having to use photo reference due to practical limitations after you have attained some mastery of that language.
Learning chord shapes to play certain favourite tunes is not the same as knowing how to play the guitar and the adoption of such an approach is a diversion from attaining that ability.
It's not good enough to say 'just play the guitar'.
That is only something that works for the genius 'naturals'.