Correlation vs causation

This is about the 2/20/23 episode re: cultivating a sense of purpose. I generally like this podcast. But I’m troubled that the episode talks about how a sense of purpose is associated with, e.g., better health, increased likability, etc. and implies that there is a *causal* relationship between a sense of purpose and such positive things. Actually, at 34:40, it does more than just imply - Shankar actually puts forth that “[i]t can improve your health, your cognitive abilities, your longevity.” What exactly is the evidence? How was it gathered? I’d like to point out that, for example, people who experience a sense of purpose may be more likely to have involved careers that pay well > more $$$ > better healthcare > better health. It seems overreaching to assert that a sense of purpose *causes* (vs is merely correlated with) better health, increased likability, etc.