Boss clearly isn't online much to see their content.
I've worked with Gen-Zers and have never seen this specific issue. Sounds like another example of a boss so removed from workers that their "insights" aren't based on experiences, but rather on that deadly combo of the tendency of older generations to negatively see generational changes, and that corporate group think where they try to justify not paying their workers their value.
It also sounds like a touch of the corporate group think where they forgot how much their employers had to teach them on the job, and how much they don't want to continue doing that.