The extended description says that they “unlike other ranged cavalry units, they have an effective ranged attack against ranged infantry”, but it’s wrong because they have very similar stats to a Dragoon and no bonus against ranged infantry.
The short description of the unit it’s correct, the problem is on the extended info panel. And no, you don’t want so much info on a unit creation tooltip because that would clutter the screen, at least IMHO.
That’s the point, correct the game. I overlook some things (like cuirassier saying that are the heaviest cavalry, there’re the mahouts) but I would report functional things like this that clearly mess up the role of the unit.
IMHO, a begginer would find easier a description than raw numbers at first glance when learning the game.