I'd love to see this put it, just from a lore perspective. These guys are not the first human druids in game after all, it seems that a human form of druidism existed before the main "Light" religion. Gilneans had their own version of it, with their "harvest witches". Sure, they're only playable as worgen but it was a part of their culture before the worgen thing. KulTiras does remind of me of Gilneas as they're both human kingdoms that are separate from the "main" human areas we usually frequent. Why wouldn't they have their own land-based religion still?
I'm going to say it again! We're getting half-elves, not Kul Tirans!
How many times must I repeat it: We're getting half elves, not Kul Tirans!
I'm pretty on board for this actually. Kul'Tirans were a pretty "meh" race to begin with in my opinion, but I would definitely play a Druid if they got these forms.