The thing is, exactly the same argument can be made for people who are too thin, underweight, anorexic etc.

Look, I totally agree with you here...

I am most interested in exploring why obesity appears to be a more prevalent trend in modern pagan circles than anything else. I guess as a sample, we're reflecting societal trends in general.

These days, having access to fats and oils is not a high symbol of status or wealth. Healthier food is more expensive and it's cheaper to fill up on junk (and frequently more enjoyable let me tell you) so how does it all fit in with the modern, neo-pagan view on diet ie meat v's vegetarian? There are no easy answers.

And without wading into the addordability side of things...don't even get me started on the continuing rich v's poor pagan divide :-) That's another topic entirely.