There is a cosmic difference between Theory of Art, and "an artist's approach to art".
How one works, why one works, how you solve the practical problems which are unique to you are "an artist's approach". No art-speak, no poo-pooing from electrical engineers. Just, this is what I want to do, this is what I want it to be, and given the self-knowledge which predicates all creative work, how I go about my business of making pictures.
As for Art Theory, well, as an old teacher explained, "An individual's shortcoming is sin; practised as a Society it is an Evil."