I mean, they literally are a hybrid.
"HALF-DRAGON
A dragon’s magical nature allows it to breed with virtually any creature. Conception usually occurs while the dragon has changed its shape; it then abandons the crossbreed offspring."
While I can respect and understand your position, I don't share it. I don't want all the races to be that prominent. In my game they pretty much all exist, but a Tabaxi wandering into a town is going to draw attention due to the rarity of them. The same with Loxodon, Kenku and Firbolgs.
With...
Yep. That's why they don't exist as a playable PC race in my game. Dragons are powerful. Whether through birth or dragon egg corruption, the blood of dragons would make the responding creature far more powerful than a normal halfling, elf or human.
Dragonborn exist in my game, but are closer...
Looks like someone may have you blocked. I was responding to a post that said that Poland's first official king was 1000 years ago, six centuries before the Americas were discovered.
1000 years ago would be 1025. Columbus "discovered" America in 1492, well short of 6 centuries. Vikings, however, discovered the Americas in 1021, 4 years before your king there. ;)
About as many times as evil Aboleths or evil Mummies.
Dragonborn are not a 5e element. They've been around for multiple editions now.
You are wrong. Every time I add in a race to the Realms is adding an ingredient to the pizza sauce. It's not adding in a side drink, because it's now a core...
No. The PHB is default lore and is setting neutral, which is why it says how things are done in various settings out there. The default setting is the Realms, but that doesn't make the default core lore apply to the Realms. Those are two different defaults. Setting and core rules.
Dragons CAN produce Dragonborn. Not Dragons ALWAYS DO produce Dragonborn.
As I said earlier, it's a reasonable thing to make up, but it's not written Realms lore. Going only by what is written for the Realms, they are all from Tymanther.
Sure. You can make that up. It's not written in the...