I know an experienced jumper (1000+ jumps) who recently pulled his handles in the wrong order - and he had a pillow cutaway and a metal ripcord handle. Yes, he should have known better.
When the shit hits the fan, there's a fair bit of cognitive load. I see people in karate class mixing up left and right pretty much every time I go to the dojo. Sometimes I'm one of them.
I have no problem with people choosing to use similar handles on both sides (I may raise an eyebrow if the pillows are the same color). I'm just glad that that's not the standard.