I would venture to say 95% of people don't enjoy (and/or cannot afford) "fine" restaurants. But mostly don't enjoy. And a restaurant would go bankrupt trying to convince them to eat healthy. The proof is the existing state of the market. Although daily GLP-1 pills might be able to change that.

This is very true, and pairs well with the other comment about netiquette.

95% of people would not enjoy polite technical discussion forums, but the 5% that do are enough traffic for a site to survive.