quality of care and then examining quality of care outcomes - which is what you suggested is better in other countries. I don't think it is. Medicare for all won't reduce obesity. What will reduce obesity is being willing to address it specifically and attack the causes. Medicare for all won't put grocery stores in food deserts or start taxing sugary or other high-calorie low nutrition food such that their purchase costs reflects their true cost.

How good does universal coverage in Europe do at reducing smoking over there?

Here's a non-exhaustive list of countries that have higher cigarette consumption than the US: Canada, Finland, Portugal, Israel, Denmark, Poland, Switzerland, Italy, Spain, Croatia, Japan, Germany, South Korea, Turkey, Greece, Belgium, Luxembourg. Having universal care does not stop people from making bad lifestyle health choices.