If "average quality" in everyone of those things was not acceptable to you and you actually needed the best of the best, and best quality could not be had in most phones....then yeah that might make sense. I doubt anyone actually cares to have absolutely top tier performance in every one of those categories though, and what most phones have is "good enough". Which is why/how phones ate all those functions. They do most of them "good enough" and "good enough" is all that most consumers care about.

Caring about performance in at least one of those categories is not that uncommon and carrying a dedicated device for that isn't crazy. I have used stand alone GPS receivers before even when I had my phone, and deciding that you need a better camera seems not crazy at all.

If you care deeply enough about any of those things that they're a major concern when choosing a phone, yes, I do make the same argument.

A major audiophile won't be happy with a phone. Someone big into 'caching' isn't using Google or Apple maps. A home theatre -phile won't want to watch something good on a phone.

Although you jest, phone cameras are always not as good as a regular camera due to the physics of lenses, apertures etc being so much bigger in a camera vs a phone.

Yeah, I finally got a Pixel because the camera was hard to beat. I since jumped to an iPhone 13, but honestly the Pixel still camera results were better. iPhone's video is the best of any phone I've used, though.