The message people are being bombarded with, which is dangerous, is "Consume".
Diet advice is being run by capitalists with something to sell so the message is "consume this." - still "consume"
In my opinion one thing that would be a good start is for everyone to stop talking about subbing this for that - which is still saying "EAT" and just STOP SELLING. If you're under 20 I reckon a lot of people could eat almost any 3 meals a day - even with chips at one of them - but including vegetables - of a reasonable size - and not be fat. IF you leave spaces between them, the rest of the time, and NOT EAT.
This is incredibly hard to do in our society. especially for young people, who tend to have poor impulse control, be very led by their peers, very susceptible to advertising messaging, and have a bit of pocket money which is probably at the spending level of cheap carbs and fast food.
I have two children who are very different in their attitudes to food. One of them is basically not interested, likes plain food best, and eats at meal times until she is full, and then stops. The other one is much more interested in food, loves cooking (she is only 5 and has more kitchen skills than the 7 year old!) loves more complex flavours, and is far more likely to ask for seconds, and eat for taste.
The way I manage their diet is that I don't offer snacks, and if they ask for one (they tend only to ask if they are genuinely hungry) I point them to the fruit bowl. They eat well at mealtimes because they haven't eaten for a few hours, so this is my chance to get them to eat what I want them to eat.
When they were younger and I used to hang out with my NCT group, I HATED the way that some of the women were always carrying "healthy" packaged (junk carb) snacks. They would give them to their own children, offer them around, and I'd find my 2 and 4 year olds were eating sugared starch half an hour before I was going to be offering them salmon and peas. One of them (the older) would then refuse the main meal which would annoy me as I would want her to have the nutrition; the other (the younger) would eat both, which is because she loves food and will eat it whenever it is offered if she can remotely squeeze it in, which isn't great.
So this is why I see this as a societal issue. I wanted to live in a society that doesn't offer junk carbs for no reason. It's a micro version of a macro issue. I can't change my children's character (the desire of one to eat the nearest, blandest thing and then stop; the desire of the other to eat almost everything in sight); I can put what I think is right on the table (salmon and peas); but I CAN'T tell other families, billboards, supermarkets, magazines, EVERYWHERE, shrieking "EAT THIS"