Why is it that people so rarely talk about their character controllers?

I normally spend at least two weeks of any project, solely working on building one because how your players interact with your game is such an important thing.

Yet every Dev Diary or post-mortem I see just goes "So I loaded up Unity and made a character controller, before then moving on to XYZ".

Do other devs just not find character controllers important, or are they just buying something off the marketplace and glossing over it in their videos?

Spent the last 3 days trying to get movement on slopes to "feel" right so it pisses me off seeing other devs just not even talk about these things.