Aye , you're right. We should try to avoid all added sugars. Or at least keep our intake to a minimum. More and more medical folk are pushing for added sugars to be classified as "toxic" and are trying to persuade the authorities that foodstuffs containing them should carry health warnings similar to cigarette packets.
As you say coke and chocolate are just 2 of the most obvious sources of added sugar. Almost all processed foods contain added sugar which is often completely unnecessary. I mean who in their right mind would want to add sugar to a curry? Yet loads of ready meal curries contain as much added sugar as a can of coke. I'm not just having a go at Coke and chocolate almost all food processors are at it.
Lots of folk are pumping their bodies full of added sugars whilst often not even knowing about it. By doing so, there is plenty of medical evidence that they are significantly increasing their risk of type 2 diabetes later in life.