I came across this video of a trauma surgeon talking about this exact topic and what he has experienced. He provides evidence and goes over how people die from injuries from years of working in trauma.
If you don't have time to watch the video, I can try to sum it up, but I HIGHLY suggest you watch the video if you are currently using Hallow Point rounds for home defense.
https://www.youtube.com/watch?v=wXwPtP-KDNk
Penetration > Expansion is what he sums up, and if you did not see the title, this is for handguns. Need not worry if you are shooting rifles.