> a majority of iOS users are in fact using Apple Maps.

That does not contradict the fact that many people install Google Maps. Reread my comments.

> Btw, you can trigger Google Maps with Siri by creating a simple shortcut and when you search for a place on google.

That does not make it work in all apps.

The app is crippled in iOS, yet people still go out of their way to use it to avoid the dumpster fire that is Apple Maps, many years after Apple Maps launched. If Apple Maps existed on Android, it would have barely any users at all, even though Apple Maps would have access to exactly the same APIs as Google Maps on Android. I'm sure Apple would like to have the traffic data that Android users could provide, but they understand that they can't get that data if nobody uses their app.

People “go out of their way” to install the Yahoo Mail app. Is that indicative of anything?

If enough people do it, it is indicative of the native mail app being unsuitable for using Yahoo Mail.