The issue with obesity isn't meat, I know that's a good thing to work on because of the issues with meat for the climate and the animals themselves, but tying this to obesity goes back to old problems in specifically US dietary guidelines pushed by various companies. The problem is insulin resistance caused by sugar and an overabundance of cheap carbs. Sugar is the big one, but things like highly refined flour is another. The entire food industry spent a fuckton of time creating the lowfat narrative, etc etc. Basically, material conditions led to this more than people's individual choices somehow magically getting worse.

What we need is readily available and sufficiently high quality fat and protein sources that are low in carbs and extremely low in sugar to no sugar for the general non-active population. If we could get things like avacado oil running at a good rate cheaply with low impact that'd be wonderful. Also, things like black soybeans (low in carbs but decently high in protein), etc, that are rarely consumed.