Someone else here (a medical doctor) has commented before along the lines of "It's OK for healthy people to eat sugar. It's when you're unhealthy (i.e. metabolic syndrome) that you should avoid it."

Well, how do you think the unhealthy people got that way in the first place? Yes, healthy people can deal with moderate or immoderate sugar intake better than people with metabolic syndrome. But at the margin you are probably degrading your health anyway.