You don't necessarily need to delve into the history of Ashan to play Heroes, especially that version that served as the basis for parts 6 and 7. Humans can officially believe in anything and strive for anything, but that doesn't negate the dark side of their nature. To better understand the Light, you must also understand the Darkness. Light spells dispel opposing Darkness spells, and removing spells in general removes almost any Darkness. How can you achieve such effectiveness without understanding Darkness? Of course, this argument doesn't require studying Darkness alongside Light in all guilds of other races, but it at least explains this seemingly contradictory combination in humans.
By the way, was the idea of "light" blinding also taken from parts 6 and 7?
No, there doesn't seem to be any blinding there....:confused:
Added 4 minutes later
Hmm.... Humans study darkness based on the logic of "you need to know your enemy better in order to fight them more effectively." There might be something to that...
Added 4 minutes later
Regarding the relocation of the blinding effect - it originates from the description of Elrath
Блистает там воздушностью прогалин.
Но между кедров, полных тишиной,
Расщелина по склону ниспадала.
О, никогда под бледною луной
Так пышен не был тот уют лесной...