Let's not turn this into a Sas v Heath row please gents... like all take a nice deep breath and smile a little!
It evidently is hard Heath... because you can see for yourself the massive rise in obesity and man made illness.
With some intelligence and thought, no not hard at all. With no good education on food, food science, sport, sports science and excercise in general and backed up with massive companies marketing campaigns selling what they pass off as food, it appears pretty difficult for people though.
For me, it is simple and despite a barrage of health (non food etc related! LOL) problems, my 'you are getting old, come have an MOT' tests recently illustrated what exercise and good food does, less than a 1% chance of heart attack or stroke, perfect bloods (nurse said the bloods of an athlete which made me smile as I've had a poor brain ache year!) and the right fat profile.
Some though, they don't have an interest in this and are literally spoon fed the junk. It's got worse with the internet as well as anyone can claim to be an expert and the diet fads or 'you must eat this' fads catch on so quickly because 'everyone' seems to be looking for a shortcut on something that should be simple - but takes effort.