I will never understand a product that only works (fits) in about 50% of the consumer base's ears.
Glad you did a scientific study to come up with your perfect 50% number.
Based on the huge percentage of earbud users I see using EarPods I have to believe your number is way off.
Could it be that, gasp!, Apple actually did the extensive studies you _didn't_ and came up with a shape that fits the vast majority of people well?
Nah. I'm sure they just threw darts at a dartboard to pick the shape...