So maybe it's possible to dump the headphone jack on some cheap-o phone model in a different market and not see a difference in sales. That doesn't mean everyone could do it for all phone models. One of the strengths of the Android market is that there's many different phone models, by different makers, with different prices and features and strengths. Maybe Chinese buyers don't care much about 3.5mm jacks, maybe those particular phones are typically sold to a certain demographic that doesn't use headphones or listen to music, maybe those are barebones phones popular with economy buyers who just want the cheapest phone they can find, etc.
So you're right that it's false that Apple is the only company that could get away with dropping the headphone jack in any phone in any market. But that doesn't mean the opposite is true, that any phone maker could drop the jack in any phone in any market and not see a difference in sales.