Maxperson
Morkus from Orkus
Aes Sedai were much closer to sorcerers than wizards, though. D&D has typically had wizardry take a long time to learn as part of the lore.I always assume that if a character has the aptitude for wizardry, actually learning to do it just takes a few days of practice with an old spellbook.
And, as always, the character building rules are there to create narrative heroes, not to define rules for all the NPCs in some grand strategy game. In the neotrad orientation of 5e, PCs are meant to be ta'veren, not a random sampling of the local NPC population.
5e PHB page 112
"Though the casting of a typical spell requires merely the utterance of a few strange words, fleeting gestures, and sometimes a pinch or clump of exotic materials, these surface components barely hint at the expertise attained after years of apprenticeship and countless hours of study."
Even so, I do allow PCs to become wizards without that, because they are in my world men and women of destiny, but it still takes at least some time in game learning from a PC or NPC wizard how to do things. Not just POOF, I'm a wizard right now without ever even thinking about becoming one, just because I leveled.