There never would have been any feasible situation with humans being dominant, living alongside dinosaurs, and vice versa.
Either they would have killed all early humans, or early humans would have killed all of them. An asteroid made this predicament cease to exist.
But, if they happened to exist today, we would probably contain them in Jurassic parks around the world.
Some people are like slinkies - not good for anything, but they bring a smile to your face when pushed down the stairs