I think, generally, everyone has their own hardships in life, their own struggles, and just like most people can't see all of what what pushes an aspie along an aspie path, an alcoholic along an alcoholic path, a grifter along a grifting path, or a person who's 400+ lbs along their path, I think we make a lot of wild assumptions that fit what we want to feel about the world and sadly quite often its about feeling better about ourselves at their expense (not always, sometimes its just sincerely not getting it), but regardless it seems like the best way of going about this is say to yourself - if you have to judge at all "Pshh....I could never let my self go like that", keep that to one's self, and keep that as personal standards. Sharing it really starts painting a lot of tautologies that society already has out there in force anyway and it ends up being an exercise in stating the status quo obvious, which these people are swimming eyeballs deep in - if it was going to shock them into changing they already typically would have.
I hope that doesn't sound like a shot at anyone at any side of this - really just a suggestion that the human condition is still rubbish, has been for millions of years, and so much of what we already grate on each other for is either redundant, arbitrary, or both. I get that evolutionary psychology drives us to be petty, drives us to try and exclude people from mating and set big stigmas on those who don't meet the right criteria or definitions but we've seen just how well that's working these days already - not much at all, and if anything what's the added stress and cortisol going to do to an overweight person's weight?
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The loneliest part of life: it's not just that no one is on your cloud, few can even see your cloud.