Exactly; the advantage of input-based approaches is not their speed. You'll learn a lot faster if you spend the time on flashcards, grammar drills, and studying.
The advantage is that it's easier, and often more pleasant, to integrate.
That said, babies do have some neuroplasticity advantages.
We should play to our strengths - babies are hopeless at grammar drills, and adults aren't as good as babies at neuroplasticity - by applying our brain to the problem.
I say that, while having built a comprehensible input tool (https://nuenki.app). But it's useful as a complement to that study, as you can more readily run a browser extension or listen to podcasts than devote your entire life to focused study.
The advantage is that it's easier, and often more pleasant, to integrate.
That said, babies do have some neuroplasticity advantages.
We should play to our strengths - babies are hopeless at grammar drills, and adults aren't as good as babies at neuroplasticity - by applying our brain to the problem.
I say that, while having built a comprehensible input tool (https://nuenki.app). But it's useful as a complement to that study, as you can more readily run a browser extension or listen to podcasts than devote your entire life to focused study.