Well aw shucks. Admittedly, skipping those specific aspects cuts a lot of the page count in many texts, especially 5E, and it's not like 5E isn't on the bloated side of most other games.
Admittedly, what I find confusing is the idea that people would prefer and seek out third party overviews and explanations over primary text. I'm not going to say they can't be better, but I'd never expect them to be. There's an absolute embarrassment of bad resources out there. Especially for something that is trumpeted to be as mutable and personal as 5E/ttrpgs are. Not even to mention how much longer it takes to watch videos than read.