This bothers me about many scientists. Based almost entirely on speculation, they offer their opinions on what something might have looked and behaved like, when the best and most scientifically correct answer they could and should give is “I/we don’t know”.
You can gather a few facts and make some pretty good guesses on what they have but you can not reach the conclusions they did.
It is like a few years back they found some prints and decided what made them was a "ferocious predictor" and a couple of decades later they decided it was a "timid vegetarian" instead.
There was no way to come to either conclusion based on what evidence they had.
I am not knocking science or even paleontology.
I am just knocking people who are writing fiction and calling it science.