As someone with psoriotic arthritis, this is just my diet (plus avoiding gluten) and honestly following it has made me feel alot better even aside from preventing the psoriosis Good initiative from the government, i wouldnt have expected them to do something that messes with junk food corporations profits like this
For comparison think about smoking. Imagine a government 70s ad that says "As a nation we are now not smoking and showed people enjoying themselves without a cigatette", but in addition cigatettes carry on being sold anyway. The addiction wins.