> People know how to use the App Store.

Apparently they didn’t because Apple Music boomed right after that change.

> It is by no means unfair, immoral, or unethical for a company to prefer and promote their own products.

It is when that company is one part of a duopoly, especially for a device pretty critical to daily life :+)

> On a personal note, I never in my life want to see advertisements for third-party software by default.

It’s a one-time pop-up, on opening the music app the first time. Same as the browser choice pop-up on your desktop. Hardly an advertisement.