Part of it, for me, is that “magnitude fewer” is a benefit, not a drawback. Mastering a bounded scope and then intentionally expanding it by hand writing new cards keeps me focused on the rock face that I need to practice and internalize. Having the next 1000 words be two clicks away, and then dozens more decks waiting after that, makes the whole enterprise seem incredibly daunting.
That may not be your experience, of course, and I wish Anki were effective for me.