He completely missed the entire point of Intents which isn't surprising since he's not experienced in Android (better said, he's just an iOS guy).
Just because you think the interface to something isn't designed well doesn't mean the underlying feature is worthless.
It's clear he's referring to the apps themselves, and he views the choice iteself as intrinsically worthless. So yeah, he completely missed the point.
I thought he was arguing a consequence of that (and the interface) and not the intrinsic value of Intents, but that may be my reading.
If I choose Photos to view images in Messaging, it's not made clear that only Gallery is an option to attach images. If it were, why would anyone choose Photos unless Gallery were somehow flawed? And even if it were, why should you have to use two different apps for each side of what to a user is basically the same operation?