I did 60 hours of that, but don’t regret it. I think it’s really cool to know how exactly they don’t stay in head, and how exactly that time was wasted
And I’m not even sure it was a total waste. Maybe it helped my intuition a lot, and even if I couldn’t recall them clearly, those readings might have been making my reading faster, or making word learning faster, or just making me see kanji better, etc.