Why does zzportal even exist

Because sometimes you're Bronze/Silver. When that happens, your team doesn't know how to push a lane and all they want to do is either farm the jungle or group mid. Then you have to trust little purple voidlings, which are controled by an AI that only knows how to march foward and it's still smarter than your team mates.

Hope this helps!

man i love getting and split push

obviously to piss u off, duh

to steal your allys CS ofcourse

They're more useful for keeping a lane pushed than they are for knocking down towers.