Yes, I can see why too. But likely not for the same reason that you do.
I think that Chauvin thought that big, strong men like George can take anything that is dished out. But surprise, surprise, they can't.
Not when they are in a prone position, their hands are locked behind their back, their own weight is pushing down on their lungs, they are being held down, others weight is pushing down on their lungs, and someone is kneeling on their neck.
I don't think Chauvin thought that George would die, but George did die. And now Chauvin has to face the consequences for his wrong decisions.