Believe it or not there are a lot of places in the world where people aren't bowled over by Apples £1200 phones.
There is a difference between not being able to afford the top of the line iPhone, and not being "bowled over" by one.
Apple's margins haven't really gone up as the price of its phones went up last year. The build and materials in my iPhone X definitely feel better than the generation I had before. The performance is fantastic. This phone is definitely more expensive to produce than my previous iPhone.
Apple is not interested in chasing the bottom of the market. They create new markets.
Analysts were insisting Apple needed to make cheap laptops for the market when netbooks were a thing. Instead, Apple introduced the iPad as a cheap laptop replacement. While a bunch of trolls on MacRumors (who will never buy an Apple product) would be interject that iPad Pro isn't cheap, the 2018 iPad retails for $329, and is often available for much less.