Well I do, because it could've all happened from the get-go and there would've been nothing for people to squawk and write Apple about, these past 18 months. They had a proven winner in the 4" size (gazillions of 5, 5s and 5c models out there). And yes, just because some were on the two-year cycle that doesn't mean a) everyone has one, or b) an A8 or A9-equipped 4" model in 2014 or 2015 wouldn't have sold in huge numbers (people like me, coming off a 2012 iPhone 5, etc.).
If it was some master "plan" that all went perfectly, it seems they sure took the long, aggravating way around the bend to make it happen...go a year-and-a-half without a current-spec'd 4" model, then release one in mid-cycle in a three-and-a-half year old body design? It smacks of scrambling and "oh crap, we kinda misjudged all this", IMO.
I've seen fifth-grade talent shows better coordinated/staged.