That's actually par for the course for a lot of Java content, and that's ok.

I'm not the youngest developer, and I like to see content on my steady bread-winner so I upvote it. Java is in a mature phase, so there are not a lot of surprises, and things to discuss. Even the shiny new things that make the platform unique like Loom have been years in the making.

Just Java being Java, where 'boring' is what you actually want from it.