Nevertheless the numbers (among other things) sell products. My girlfriend can do just fine with her 16GB 4S just as my mom with her HTC with 16GB. But when asked if they prefer 8 or 16GB they choose the latter. The higher number win. So it's obvious for me, even from a marketing point of view, that Apple should offer more - premium brand, "premium" storage - no scrimping on storage.
Because the fact is that this 8GB 5C is still a lot of money (especially in Poland - $752 with $891 being an average monthly wage here). So sure, many people will do just fine with 8GB of storage, but when you're asked to pay that much money for a supposedly premium product and you're getting poor 8GB then you're feeling ripped off.
So that's that. I love Apple's ecosystem, their design and so on. But their pricing on storage is absurd. It's as if one is buying a Rolls Royce with a $500,000 tag that comes with a 10 litre fuel tank - maybe R&R data shows that most people just use their cars to drive short distances to work and back home, so that capacity will most customers just fine. And if they wanna go further... well there are gas stations every couple of miles.