The thing about lane splitting is:
It doesn't matter if others do it, the choice is yours. It's legal, but it's not the law, meaning one does not HAVE to do it. No one will fault you for riding in traffic if that's what you choose to do. Having choice is good.
Do I split lanes? Yes
Do I do it aggressively? No, I do it wisely. I wait for gaps. I wait till I know I am noticed as most cars will scoot over a tad if they see you're coming up. If not, then wait till one does.
Do I always split lanes? No, but I do most of the time. On the days I choose not to it's usually for reasons such as weather, poor visibility, lighting, position of the sun into drivers eyes, or just the "gut feeling" not to.
Do I feel safer splitting lanes? Yes I do.
There is a greater risk that you will get rear ended in slow and go traffic, than getting sideswiped by a car in lane. We all know of someone, maybe even ourselves, who has been rear ended in traffic. An occurrence of sideswiping is much. much lower. Speaking only for myself, I can think of no worse way to end up than sandwiched between the car stopped in front of you, and the car rolling up from behind.
Remember, the onus is on the rider to be safe. If you don't feel safe doing it, than don't.
But that's me, and I may be wrong.