Seatbelts, are said to be the object that causes the most deaths in emergency situations on airplanes. (this part is hearsay, just ancillary! :) )
I free-dive, and one of the rules we were taught is that for emergency situations, the diving belt should be set up so that it is released with your preferred hand. So, unclip opening from left to right for a right-hander, and vice verse for a left-hander. (the belt buckles are the same)
This is a rule to stop confusion and save time in emergency situations, for obvious reasons.
My observation is that, given that 90% of the world is right handed, it would make sense to make all of the seatbelts right-hand quick release, but as I see them, on every airline I have flown, the seatbelts are 50/50, and randomly dispersed.
Seems like a very cheap miss to increase safety in emergency situations!
[question] are there no free divers who design airplanes?!