Considering how Ardenweald is connected to the Emerald Dream and they’ve allowed every race to join. I don’t see this as a problem.
From the development team and I quote “ Ardenweald’s connection to the Emerald Dream was important to the team, Ardenweald and the Emerald Dream are opposite blooms connected to the same tree.”
So pretty much makes your argument useless. If you can join the Night Fae, your connected to the Emerald Dream. That’s the lore they’ve chosen to create… so yes, all races can be Druids as of Shadowlands.
Personally I wouldn’t make a Druid, just saying if you follow the lore, and everything from Blizzard itself, other then what’s said in General Discussion, you’d have a little more knowledge.
Ardenweald is also where many big Druid figures go to be reborn back into the world, Cenarius is a well known figure who did this journey and many of the wild gods.