Please Explain Lane Splitting

Please understand that I am not a goody two shoes nice guy risk adverse geeksquad fella..

I have raced desert , enduro , hare and hound.. I ride high mountain single track at speeds that most would consider insane. I play hockey 3x per week , I ski experts chutes and bowls , Ive been 165 on a roadbike. But I try to be smart about my risky adventures ...and riding between drivers that may not even trust there own skills is not a risk I am willing to take.