Their are two parts to game developers. Artists and Engineers. Engineers want to make the physics engines and all of that. The artists, just want to make art in the game. So depending who you ask, artists will seek an engine already made. Engineers will too, but tend to want to make their own engines.Yes. You've listed a lot engines that have physics already made for you, I'm saying it's cool to make your own stuff from scratch.
I can fully agree to your statement because im in that same boat.