I’ve not heard Gray Maynard or Holyfield recently.
Chuck Liddel took massive amounts of drugs so I don’t think you can necessarily put that down to head trauma.
It could be the head trauma or it could be the drugs, hard to say for sure.
Everyone that gets hit in the head loses brain cells and neural networks get destroyed. Everyone loses the same amount of brain cells.
I think that there are 2 kinds of people:
1) Group 1's brains are very bad at rewiring the destroyed neural networks with their remaining brain cells to "fix" the damage. These guys end up retarded.
2) Group 2's brains are very good at rewiring the destroyed neural networks their remaining brain cells to "fix" the damage. These guys can eat tons of punishment and barely seem effected.
It's like group 1's brains are made out of plastic and group 2's brains are made out of slime. If you punch a hole in plastic, the hole just stays there. If you punch a hole in slime, the rest of the slime just oozes into the hole and fixes it. Both "lose" the same amount of material but only the plastic has any "damage".
How can taking drugs interfere with this? Drugs fuck up your brains ability to rewire itself. So, if you're drunk or high a lot then your brain never gets the chance to fix itself and even if you have the genetics for group #2, you're going to end up in group #1. So smoking pot alone may not do much bad stuff to your brain. If you're in group #2 then even fighting may not do much bad stuff to your brain. But smoking pot
and fighting will do very bad stuff to your brain.
It's just my idea. No one's explored this scientifically and I don't know how you could, ethically. Lol. But it makes sense to me. And it seems to pan out in the real world.