I think it's a pretty natural tool to "grime" on, here's why:

The Domino is uniquely able to make a project easy and fast, but is pretty much inaccessible to beginners. A job that can be done in a few minutes with a Domino takes a few hours making mortises by other means, or using dowels, and all those other means take more skill to use than a Domino, which is as easy to use as a biscuit joiner. And there's no home gamer version.

When I see a Woodtuber pull out a track saw, I can translate that to "my circular saw and my straight edge clamp. Got it." When they pull out a spindle sander, I say "sanding drum in my drill press. Got it." When they pull out a Domino, I go "...decide which of a few other joinery systems are available to me, possibly redesign this part of the project to fit these new limitations, spend a lot more time laying it out and setting it up, then carefully make a plunge cut with a router or use a dowel jig. Got it."

Some woodtubers don't ask themselves "is this a beginner project with common general purpose tools, or is it only quick and easy because I have expensive specialized tools?"