For me, I find it helps if I think of the review sessions just like flipping through paper flashcards - it’s not a test, so it’s ok to get it wrong. If I can’t think of the right answer quickly, it just means that I need to study that item more, so it makes sense for it to drop to a lower SRS level.
I’d really encourage you to read through some of the posts made by people who reached level 60, if you haven’t done so already. All kinds of people make it to level 60 in all kinds of different ways. There’s a collection of their posts linked from this thread: