There sad reality is that cacao is extremely bitter, so every gram of sugar is sorely needed to balance it out. I've settled on 70% cacao (so like 29% sugar) as a good balance of being dark for the endorphins and still enjoyable to even eat. Over 90% it stops even being the consistency of chocolate and starts to approach something resembling a brick of raw cocoa.
Dark chocolate is great, but check the label carefully!
https://www.youtube.com/watch?v=RzWWOQMLttE
I like chocolate as much as the next guy, but personally my skin always starts itching all over (inflammation!) and breaking out in acneic pustules on the chin, be it dark, milk, cacao powder, whatever. It's the same reaction I get from other high sugar content candy.
The discussion is about chocolate in general, so noting that one form of chocolate is much lower in sugar than another is hardly "whataboutism".
Milk chocolate usually has higher sugar levels than dark chocolate.
85% dark chocolate has something like 3-4g sugar per serving. That’s less than what’s in a typical slice of bread in the US. Which may say more about the bread than about the chocolate — but the point is that you’re probably getting more sugar in your “healthy” lunch sandwich than in the morsel of dark chocolate you have for dessert afterwards.
(P.S. the chocolate also has more fiber than the bread!)