I wouldn’t really call it “unambiguous”. For most of the USA’s history (up to the 60s) there was no right to counsel at all (if you wanted a lawyer, you had to hire one yourself). When the SC first introduced the right to counsel it was only for felonies. It was only years later in 1972 after that that misdemeanors were also included. There still isn’t any right to counsel in civil cases (which is why cities love imposing civil penalties where you have no right to a lawyer to help challenge them). Even in criminal cases, in most places you only have a right to counsel if jail time is possible. Well actually that’s not entirely accurate: the SC clarified in a later case that you only have a right to counsel in misdemeanor cases if jail time is actually imposed.

The constitution doesn’t actually provide for an unambiguous right to counsel. You have an inferred right that applies in certain cases so long as the country’s 9 favorite people don’t decide that no, you don’t, actually.