Not everyone in the world when they think Dino go “ooo, T.Rex” some like myself used to think Triceratops or Allosaurus when I was a kid, and I name Spinosaurus off the top my before T.Rex, and there are probably people in the world who do the same.
T.Rex is popular cause it was overused, to such a point that unless something has T.Rex, most people aren’t gonna watch a Dinosaur show or movie, even if it’s Good.
So there is being popular, and than there is being an overused show pony.