Nobody does that (or almost nobody?). Sugar consumption comes from almost everything nowadays, from white bread to sauces to... everything. Or maybe your comment was ironic and I didn't get it, sorry then.
I didn't go for ironic, but it was meant rhetorically. Attacking the OP by equating coffee intake with sugar intake is a bad faith argument, precisely because sugar is a prevalent food additive while coffee is not. Moreover, the OP clearly said "drinking coffee". not "ingesting coffee/caffeine".