a really nice thing with spaced repetition is that you haven't replaced how your memory functions, just augmented it a bit. but it's still fundamentally your same brain, one with the ability to ask questions like "am I zooming too much/not considering all options?" or "is what's salient to me actually what's happening?" doing spaced repetition doesn't have any bearing here unless it gives you a false sense of confidence in what you know or doing it crowds out developing other skills.

I'd expect H3 to be true, ceteris paribus, but would also expect that having the ability to ask questions like the one above and just think better to be of greater importance, i.e. someone whose thinking habits are more developed and doesn't use Anki would be a better researcher/doctor than an Anki savant whose thinking habits are underdeveloped.