That's no good argument.
First of all, the iPhone 7 and 6s will also probably start at 16 gb. Those are not entry level devices. Second, iPhones are expensive. The entry level device is almost $700 in pretty much every country outside the USA. So we're talking $700 devices with 16 GB.
The problem is never as simple as it appears. The strong dollar and high local taxes are what's driving the price of Apple gear higher. If Apple included everything the people on these boards wanted at a price point that's $200 less, why bother having an entry level phone at all? People will always want more for less.
If Apple misjudged, then they'll either add more value or lower the price. My guess is that the vast majority of these users will be very happy with the performance of their phones, not to mention support and OS upgrades. Specs aren't everything. If it were, then no one would be buying flagship Android phones, judging by Anandtech's review of the 6s.