That's not the point.
Unlike Apple lovers or tech heads, the average person still has ear/headphones with a 3.5mm plug which Apple doesn't have a port in its iPhones anymore. Not everyone has the money to keep buying newer accessories Every time that Apple changes the iPhones designs. Some bluetooth ear/headphones music quality still stink so why pay money for that when you already have good, working headphones?
Apple no longer include the 3.5mm adapter in the iPhones which cost ~$10 USD now and you'll need several just in case you forget to carry one or lose one.
Eventually, Apple will probably start to phase out All accessories so that all people are buying is the iPhone and nothing else, not even the cheatp 5w chargers or lightning headphones. For ~$1000 iPhones, that's Unexcusable.