I like fruit. I like pastries. I eat plenty of fruit and the occasional small pastry. This is a perfectly healthy, balanced diet. Sure, I could choose to never eat pastries (or to eat pastries with half the sugar in), but the overall effect would be to lower my happiness.

Your approach strikes me as the sort of dietary absolutism that is actively damaging to public health.

The salt thing is a case in point. Perhaps it's theoretically true that we could all learn to enjoy our food with less salt. But this would be very hard, and I'm not convinced that an ordinary amount of salt is very damaging to health (except in the case of some specific health conditions that most people don't have).

But many schools in the UK take your approach: kids get taught to cook meals with no added salt (and also the bare minimum of fat). Everything they make therefore tastes bland and tedious.

The result? These kids don't learn to love cooking or home-cooked food. Instead, they learn that the way you eat food that tastes good is to order it from restaurants and fast food outlets. This is much more expensive and much less healthy than cooking at home using a reasonable amount of salt and fat, and it's a public health disaster.