A 3.5 mm jack is just more stuff that needs to go into the limited thickness of a smartphone. They also need to be made water-resistant, and it’s just another potential point of failure. And for those who don’t use them, they’re a useless lint trap. Overall, they just cost more to produce which puts more cost onto the consumer.

Thus is straight up a lie. They cost less than a dollar to buy and put in a phone. Even the thinnest iPhone could have one without it impacting space and finally they are just as easy to waterproof as usb c port.

But yeah keep regurgitating the same facts big companies want you to use cause a extremely backwards compatible analog audio standard is less “convenient”