This is exactly my point: glucose, fructose and sucrose are not unhealthy. They are just fine. Unless one exceeds. Glycemic index is relevant. Eating a bit of sugar sometimes or an apple is just fine (fruit is a great source of sugars, but it is also very healthy).

Problem is that in America and UK they manage to put additional sugar even in the pasta sauce… Everything is so sweet that it tastes bad for many foreigners (it tastes bad for me for instance)

Source: we have a similar background but mine is more theoretical (modelling, hpc, biophysics, theoretical biophysical chemistry and theoretical chemistry), I have a PhD as well and I used to work in academia (on both biological mechanisms and materials for renewable energy) before moving to AI in industry (different sectors). We are saying the same :D