A bit of history: I did a MA in photography. Interesting but not life-changing. At that time, all photographs seemed to be feminist tracts, whatever their subject, whatever their purpose. I found I could take random objects and devise ways that they illustrated and confirmed that Men are Horrible. You’re seeing my reaction to that.
I saw this from a different perspective, an almost schizophrenic change at times, I was in a relationship with someone doing an MA which was dominated by extreme feminists. I won't go into details. It was another 7 years before I embarked on an MA myself, there were no similar issues.
Photography as a medium is very broad and veers off in many directions. There are no simple definitions of Photography as Art, Fine Art, or the Aesthetics.
Those trying to explain photography as Art are writers, like: John Berger, Susan Sontag, Peter Bunnell, Beaumont Newhall, , Mike Weaver, Peter Turner, and a great many more.
Can't we just enjoy art without having to write a thesis on why?
On a Forum like this, yes. However, on a personal level, understanding why you make images and what you are trying to say, is important. How deeply we explore this is an individual choice. In my case, lecturing, exhibiting etc, and shooting project based work made this relatively easy. The ability to contextualise your own work, or that of others, is critical when approaching galleries, and also applying for arts funding.
On my MA course we had to write an extended essay about another photographer's work in the first year, and an exhibition set and a thesis about that work in the second year, both with extensive references.
It's quite complex to discuss practically in Forum threads, and then we all have different approaches, and are unlikely to agree on all aspects. So yes, we should enjoy art/photography.
Ian