(Posting under a different username because I got "you're posting too fast" error.)
That said, in philosophy I often have the feeling that some "common sense" view I hold is more accurate than the rigorous, less clear views that I'm studying. Almost always, there turn out to be problems with my common sense view that weren't obvious to me at the outset, and necessitate the extra rigor and abstraction.
The unfortunate bit is that if you don't "study" (as you put it), you'll never notice these little flaws, and go on thinking that people are intentionally overcomplicating things. (Made worse by the fact that certain people actually are overcomplicating things -- but that's not evidence against the fact that many things are, in fact, complicated)
That might very well be true -- and of course you can (and plenty do) argue that academic CS isn't worthwhile either -- but in both cases it isn't obvious the nuance is useful/justified until you dive into the weeds yourself.
I'm in no place to defend the whole field, but I do think it takes a special kind of cynicism to claim that one of the (if not, the) longest running academic projects on Earth "could be summarized on one page with little information loss."