I can understand why Riot wants creepblock, but why can people on the same team block each other?

I guess to give ghost effect an actual advantage

unless I missed the last lore update, not every champ is intangible

for the same reason you can kill your team mate in csgo in ranked

hidden ways to troll teammates lol

So allies can't sit on top of you and make you untargetable. It's the same reason ally creep block exists.

Creepblock/pathing do need to get fixed. They shouldn't remove them though.