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But no, that's exactly the problem? My experience reading one of these books is, I am bored + frustrated because they are spending a long time saying things I learned 15 times already from other areas but pretending they are kind of new. Then eventually they are so mired in
their own obtuse terminology that I cannot proceed, but, also they never showed me anything that made it make sense to invest more energy in trying to proceed. Because all I saw was stuff I already know from other subject areas.
If you want to see things that really motivate expressing things categorically, presumably a context like algebraic topology (where categories etc. originally came up) would be better.
If you learn about categories to talk about maths you already know, it'll plausibly just be a different perspective. Perspectives are still valuable, and sometimes they can help with "asking the right questions" (what topology should products have?), rather than answering them.
simplicial sets are one example i know of where the categorical defn is clearer and simpler than the “longhand” one. another advantage is once you know about the framework, it is easier to transport knowledge between seemingly very different topics 1/2
for example presheaf techniques let one perform similar constructions in vector spaces, logic, homology theory, and combinatorics (via species).
That's kind of the point of category: to pile abstractions onto abstractions so that certain things become very short to state. It takes years to become familiar with all this stuff, but then you can work on a very abstract level where you can get rid of all unnecessary details.
I would guess that it has not much to offer to you personally.
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