The idea that people don’t need headphone jack seems pretty weird. Phones removed the 3.5mm jack, so people had to buy Bluetooth headphones, because now there is just 1 port on the phone.
And now, because of this change, you’re looking back and saying that that’s a not needed feature.
One of the biggest draws of YouTube is that anyone can go and upload their stuff. We literally have youtubers who started out in their rooms with a webcam, and became big because of the quality of their stuff. This would put a barrier of entry for new youtubers to enter.