People voted for a more sealed phone with their wallets.
LOL imagine if capitalism actually worked this way...
Edit: People seem to be missing the point. I am aware that phones with 3.5mm jacks exist. I also just understand that capitalism and "free markets" don't actually work the way people seem to think they do. Maybe if the headphone jack was the most important feature to people, it would do better. Or maybe if it was an mp3 player and not a phone. Or maybe, simply, if it was manufactured by a brand people have heard of. Sometimes it's literally that simple.