Twisted Treeline(bots)

so, i know nobody seems to give a damn about bots, which is understandable in a way, but for the sake of new players and those who like to play bots (me when a new champion comes out or when i want to test something out) why can't i pick difficulty on twisted treeline anymore?

honestly they are stuck in beginner mode and i remember intermediate bots on TT being harder than intermediate on SR so what happened to that? has nobody noticed this? did riot remove this to make it so TT would always be so easy for new players and force them on SR for a harder experience? or is it just a bug that riot doesnt give a damn about because ''its just bots''?

It's really not that i care so much about what happens to bot games, hell, they could remove it entirely and i'd still play the game, but isn't this a bit curious?