OK so this last Dinosaur was found thousands of years before the KT boundary, so that proves the meteor killed all Dinosaurs thousands of years before it hit??
uuuum OK,
So let me guess, That Wooly mammoth from 10,000 years found frozen in Siberia proves all Woolly Mammoths were driven extinct by the Tunguska impact in 1906
This Dino killed by the Meteor thing has ceased being science a long time ago
In Science you gather data and form a hypothesis
In fake science like this and global warming you form a hypothesis and try to shoehorn all data to make it fit.
Paleontology has always been a competitive science with competing schools of thought trying to push their theory to acceptance.
My personal belief is somewhere between the two competing theories. I don’t think they were completely gone but were nearing extinction all by themselves. The fact that mammals were already on the rise seems to suggest that they were filling vacated ecological niches.
I also have problems with the animals that survived. Not all were aquatic dwellers or burrowers. Even some aquatic dwellers like alligators are shallow water dwellers and would have to survive years of super heating or super cooling depending on the global effects. Lots of insects that aren’t burrowers or swimmers survived.
I think it was a real bad time but not as bad is the impact extinctionists need it to be to exterminate a world full of dinosaurs.