the simple answer is yes, it does. I'll try to explain the best i can.
First, you have to understand "nodules". they are basically small dents along your structural system where the nervous system gets closer to the skin becoming more sensitive, we call these "pressure points".
Take your finger and run it along your jawline and about halfway down your jaw, you will feel a small "dent", that's the nodule; and that's what boxers hit to get a knockout.
The more pronounce your jawline, (like Jay Leno), the larger the "nodule" which makes it easier for someone to hit it.
You could argue genetics and neck strength have a lot to do with chin strength.
But if you look at the all the guys who are known for there chin's in MMA, none of them really have big chins compared to head size.
Right....they have big heads AND big chins. The two typically go together.
This is basic fucking physics. Hit a baseball with a baseball bat...see ball fly a looooooong way. Hit a bowling ball with baseball bat...drop bat and cry like a bitch cuz your hands hurt and the ball didn't go anywhere.
Please advise if someone has somehow managed to get an exemption to the laws of physics for combat sports.
Big, thick, head and jaw isn't the only factor but it is definitely a factor.
You're head doesn't just sit there like an airborn ball does though, the neck controls its movement. It's a neck strength and mental thing. How else do you explain Nate Diaz having a great chin with a smallish head and James Thompson having arguably the worst chin despite his massive head?
Not to mention your example is far too exaggerated to be taken seriously. Do you realize how much heavier a bowling ball is than a baseball? A softball and baseball would be a far better comparison for comparing small/big heads, and there really isn't much difference in how far one can hit a softball as opposed to a baseball.
I'll concede that the softball example is more accurate than the bowling ball. I was exaggerating to make a point about physics that although simple, seems lost on a lot of people.
That being said, you obviously know as much about baseball and softball as you do about knockouts. Average distance to center field in adult softball is about 225 feet for a home run to center field. Average distance to center field in adult baseball is about 420 feet for a home run to center. That baseball is flying almost twice as far as the softball.
So, we can teach Mr. Baseball to bob and weave, do neck exercises, keep hands up and chin down, but at the end of the day, he's still a muthafuggin' Baseball. Neck exercises will never turn him into a softball, much less a bowling ball.