I mean, this is a textbook over-simplifaction to devalue an idea. Hell, with that logic, you could call all kinds of things a non-starter.

"Why buy a watch, it just shows the time on my phone" "Why buy a car, I can just use uber" "Why buy headphones? My phone has speakers."

The context of where something is changes the idea of what it is. Just become something tells the time, for example, doesn't mean it is the same thing as a watch.

No it's text-book pointing out the bloody obvious. It's a voice memo app sitting in an ring with limited functionality/usefulness. You can tart that idea up however you want but it's an obvious limited value idea itself at it's core and it is exactly the type of thing that will do better as an app on somebody else' platform.