You should read Robert Sapolsky's new book on free will. The more you learn about biology the more you realize that willpower and free choice are a convenient illusion that appeals to human narcissism but doesn't actually have explanatory power.

The introduction of fast food caused America to get fat. The introduction of Ozempic is helping America reverse that.

Neither of these changes are because the average American gained or lost willpower.

These changes are because of biological cause and effect. Fast food and Ozempic are products that hack ancient biological circuits that drive behavior. It's empirically falsifiable causality, not vague woo.