kamikatze e*scooter riders

In the past few days, I've seen a quite a few e-scooter riders (as well as bikers) not valuing their life and riding without a helmet (I know it is not illegal) in the middle of the overcrowded intersection while there is little to no visibility. Imagine the intersection near LHOFT with 2 busses trying to cross onto the left lane while the cars on the opposite side are trying to go on the right (the same lane) and the e-scooter is in between the incoming and outgoing lanes trying to cross in the middle of the whole intersection. Am I not getting something? Why are bikes and scooters riding in the middle (between the incoming and outgoing lanes) and not on the right side of the road?