That doesn’t mean much really. The failure rate for going vegetarian or vegan is about the same, between 80-90%. It’s about the same for any major dietary change. Changing what you eat is extremely difficult, no matter what the change is, weather it’s eating less, eating more, or eating different foods. Most people will fall back into old habits at some point. It’s not an individual problem, it’s a problem with the food industry and society, like you said in the last paragraph. That doesn’t mean individuals shouldn’t try change where they can though. It’s much harder than it should be, but it is worthwhile at the end of the day.

I mean, it does mean much. It means that any attempt at doing so is more or less fruitless and people who say otherwise are just exhibiting confirmation bias and are almost certainly more privileged than the 90%. And of course I’d also say that’s why moralizing vegetarian or vegan diets is also nonsense for the same reason.