I interpreted the GGP to mean something like: think about how you learn your first language -- you spend a ton of time listening before trying to speak. Don't focus on speaking so soon. I don't think that is so much "wishful thinking" as an interesting strategy to consider.
I'd do it for spanish, but I can't find star trek with (latam) spanish audio.
I don't think so. Babies are constantly making sounds and trying to speak even when they have a very poor grasp on the language.
I personally learn much more from fumbling around with a language, and letting fluent speakers correct me, than I do from listening to it - though both are helpful. I recently had the opportunity to watch a lot of Spanish TV with a couple native Spanish speakers and I learned a ton from it. Through the commercial breaks I'd be repeating phrases from the show and asking them about it - or telling them my theories about what was going on in the show to see if I was understanding it.
There is little in common between language acquisition in kids and adults. And I have been reading the literature, and you have one research group that says it is the same, another saying it is different.
Find me one kid (maybe there is one, but you get the idea) who is growing up in a household in which the local language is spoken and does not sound native when they speak.
I'd do it for spanish, but I can't find star trek with (latam) spanish audio.