No I was not in an AFV, I retired from the Navy and rode ships. There's no place to go in that environment. If you are knowledgeable and capable you step in where others have fallen in combat. Also, if forced to abandon your ship you augment the unit that picks you up.
Regardless you are assuming worst case.
Suppose on the way to the battle your vehicle becomes unusable and there is for whatever reason an abandoned vehicle nearby that is usable. Would you abandon the fight?
Maybe it's just perspective but to me a tank is a tool like a rifle. If my rifle broke I'd find a