All I need say is this. 5E SCAG: "In the Forgotten Realms, MOST Paldins, like Clerics, are devoted to a deity". And the same section goes into how deities make devout Warriors into Paladins.
The quote from Ed Greenwood I posted on the last page is pretty clear cut in regards to this. People need to differentiate between rules of a game system and the actual lore of the settings in which that game system is used.
