True, but if you're designing a product, you want to target the 80% and the average thumb length.

As I see it, that's how the iPhone penetrated enterprise. Everyone is a consumer, but not everyone is a business consumer. Regular people go to work and turn into business people. If regular people love the iPhone at home, why wouldn't they want to take it to work? Why were companies in 2006 designing smartphones only for business people instead of for everyone?