Well, I always have guake running, so for me doing it all on the command-line is WAY faster and more convenient. I forgot to mention that "pass" also has command line completion - which makes retrieval trivial.
I would also be surprised if someone somewhere hasn't already written an "autotype" layer over pass, but thats not something I am personally interested in.
I do agree that for end users this may not be the case. For non-technical people (my parents, for example), I mostly recommend writing their passwords down on paper. They have very few passwords as-it-is, and almost none of them are critical.
My own use case, where I have literally hundreds of pieces of info I need to secure (passwords, key-files, gpg keys, ssh keys, etc), is very different from that of such users. Hence different tools.
Oh, also, "pass" can copy the password to the clipboard, making the copy-paste scenario trivial. In fact, it goes even further by clearing the pass from the clipboard after a preset time.