"Just abstain" approaches have failed repeatedly and conclusively in public health. Hell, it's hard enough to get people to wash their hands after pooping and get vaccinated.
That's not the only advice. But, without that piece, you are unlikely to make progress. Hence all other advice is secondary to it.
> The mouth. That magical orifice where the cake enters and the excuses exit.
I don’t think you’re a font of nuanced advice on fitness.
Oh except the heroin is available literally everywhere and you need to do just a little bit every day to stay alive
It's more in the realm of "just be happy" to a depressed person. Sure, that'd help a lot. It's the how that's tough. So we move the levers that aren't rusted solid first.