Wisdom teach

I wonder if the reason we have wisdom teeth is widely known. It makes sense that if (in the wild) humans live about 50 years, then we should get some replacements for our worn out chompers about halfway through that life. Wisdom teeth are big, and specifically designed for chewing.

100k years ago, plants were a major calorie source, so the chewing teeth would be the ones most likely in need of replacement. And figuring we lived tough lives w/out health insurance and dental care, by the time we're 30 we would have lost a tooth or two to disease, decay or injury. Having a big honkin' tooth come in, helping to push the remaining the teeth together, and replace the lost one, makes sense.

All this comes up because now, at almost 40, a wisdom tooth is thinking about coming in. So far 2 have come in just fine, and 1 was removed because the tissue around it kept getting infected. This one has no room to come in, and I'm not looking forward to having it pulled. My father's final wisdom teeth didn't come in until almost 50.

I wonder if wisdom teeth come in sooner or later based on the amount of wear and tear on your entire system. Would it make a difference if you are an athlete or a a desk jockey, would they come in later because your body in general is being used up at a faster or slower rate.