Which is why I massively prefer Eberron, as the original setting makes no sense at all.
Not that Eberron is without its faults but at least it's coherent and embraces what it is.
https://www.dndbeyond.com/posts/279-welcome-to-eberron-an-in...
Forgotten Realms was not the original setting of D&D. To the extent there was one, it was Gygax's Greyhawk campaign.
https://en.wikipedia.org/wiki/Dungeons_%26_Dragons_campaign_...
Note that Blackmoor and Greyhawk, at least, were used by their respective creators/DMs (Dave Arneson and Gary Gygax) for quite a few years before being published. I suspect that's true of at least some of the other settings as well (Forgotten Realms was Ed Greenwood's campaign world before it was published--it looks like it was a D&D campaign world more or less from the release of AD&D 1st Edition in 1978).