Riot, why does coo-op vs AI lack junglers?

Why is there no jungle aspect in co-op vs ai? the bots go 2 top, 1 mid, 2 bot. This isn't how actual pvp games work at all... I could understand if the beginner mode was like this and maybe intermediate had an actual jungler for both sides, but nope. You can only learn jungling through outside sources & trial/error in pvp modes like normal draft/blind (or practice tool but then you have 1 enemy and no challenge at all).

There's a reason this role is considered so daunting compared to the rest... literally your own game doesn't even try to teach players how to do it. I also don't recall starting the game with smite. I had to level for a while before I could unlock that summoner spell and flash, which also makes no sense. All the summs should be available from lv 1. Not having flash is a huge handicap right from the get-go for the majority of champs.