Plus there’s evidence to suggest that the asteroid impact ‘reignited’ the volcanism in the Deccan region of India on the other side of the world. The force of the impact traveled through the earth and ‘rerouted the plumbing’ which intensified the volcanic activity in the Deccan area causing the release of huge amounts of climate changing gasses.
It was speculated that the volcanic activity that occurred in this region 66 million years ago caused the mass extinction long before we knew of an asteroid impact. The fact that the volcanism in the Deccan region of India happened to intensify at the same time that an asteroid struck on the direct opposite side of the earth is just too big of a coincidence. It had to be linked.
India is almost directly opposite of the asteroid’s impact site in the Yucatan Peninsula. Perhaps if the asteroid had struck elsewhere, or at a more oblique angle, the force of the impact would have been less, or maybe it would have been directed away from the highly volcanic Deccan region?
Either scenario probably would have meant that at least some of the non-avian dinos would have survived.