This is something I've often thought about. You have a few pictures, the AI would generate the rest. The result is a 3d version you can walk through. We can already almost do this with a single picture right now.

This mirrors my experience.

Yes, but that isn't a typical situation.

Because it's the one thing that is required and that hardly anyone wants to do. Out of all of the people I have known the amount of people that regularly exercise is at most 5%. The amount of people eating a plant based diet, or at least considering their diet at all, is about the same.

The problem is that in nature, as hunter-gatherers, these issues weren't present b/c we were forced to exercise, for survival, and our diets had limited processing and more fiber. The meat was tougher, hence the need for cooking, and it was also leaner.

What's funny to me is that once you are an "exerciser" you can see it in the face shape/color of people. You can tell when someone is just thin from not eating but still in weird way "thin flabby" and in poor muscular health. You can tell when someone has good cardiovascular health and you can also tell when someone has poor CV health because they only lift weights and can't run a mile.