1) I bought a pair of bluetooth headphones from china about three years ago for $20, the price hasn't dropped.
2) Aliexpress has nearly 100k results for bluetooth headphones there has always been plenty of competition, they are still shit.
https://www.aliexpress.com/wholesale?catId=0&initiative_id=S...
3) I agree with this more people have spent alot of money on bluetooth headphones that don't work, how is this a benefit to anyone but the corporations that profit from it?
As you said yourself you can get bluetooth headphones for $20, but you wouldn't because they are shit. We don't need lower prices we need better value headphones, removing the headphone jack has done nothing to help this.
There where cheap and shitty, wired and wireless headphones before they removed the headphone jack, there are cheap and shitty wired and wireless headphones after, the market is not better off and the customers are especially not better off.
Edit-
AirPods are the first decent bluetooth headphones, they are the competition not the lack of a jack. Look at that aliexpress link its not even a competition they are just copying the style and shoving the same shitty gear inside.