My goodness, folks will rationalize anything to themselves.
Or, they'll simply put a modicum of thought into things.
Scales don't provide inherent protection. You go and hit a snake in real life and your attacks aren't going to glance off them because of their scales.
Ergo, Draconic Sorcerers are getting an AC because they're specifically hard dragon scales.
If Dragonborn had the same scales as dragons, then they'd have 19 AC baseline like an adult dragon right?
But they don't. They have no innate AC bonus. Thus, implying that they don't have hard dragon scales and instead have just soft Dragonborn scales.
Dragonborn are decended from dragons, but they're not actually dragons. Hence they don't have wings, can't use breath attacks at will, don't have damage immunity to their natural element, don't have claws and teeth that can be used as weapons. Or should we start giving Dragonborn all these features for "Flavour" because they have the word "Dragon" in their name?
