Here is a rather typical article on the dino to bird theory:
It purports to show the relationships between certain taxa and implies the validity of the dino to bird theory.
But what it actually does is, it assumes the validity of the dino to bird theory and then shows that if that theory is valid here is how the taxa would be related.
If only they would be honest and say that, things would be so much clearer.
This pattern occurs quite frequently. The authors of many, many studies and articles do not evaluate the validity of the dino to bird theory. THEY ASSUME the validity of the theory and then arrange things around that assumption.
And then people in this field say that the dino to bird theory is valid because look at how much validating material there is over the years. They forget (ignore) that those studies were based on the assumption of the dino to bird theory.