If any of you are old enough to remember funerals from the 50's and 60's, many were due to being ejected from the car, usually a rollover or hitting something hard enough to go through the windsheild.
I will always find a way to get some kind of restraint to keep me in the car. Sure it could be on fire or roll into a lake and I might be out cold. These were the old agrguments for not wearing a seat belt.
My 56 post has basic belts bolted in, if the next owner wants them out, weld up the holes and carry on. My race cars have 5 point, probably should change to 6 point, would not go on the track without them. I've been lucky but have seen a few big wrecks from the driver's seat.