People feared they may have to deal with that stupid kid/man on a crochrocket blowing through those in between lanes like he owns the whole damn road and putting others at liability risks cuz the law says he has the right to be there.
That can apply to any privilege, there's bad apples in just about every group no matter the activity. Just because one has the privilege of obtaining a driver's license doesn't mean that he/she can operate a vehicle properly, safely, and with care and courtesy toward other motorists sharing the roadways ...With that said, lane splitting makes more sense than not in heavy traffic areas.