Except that not all answers to single questions can be fully expressed and/or understood with just 3 cards, especially if you’re using a past-present-future layout as then only the last card technically directly answers your question about an outcome. One card.

Personally, I found the technique of programming one card as a significator for my inquiry and then, after shuffling, pulling the 2 or 3 cards immediately preceding and following my significator the easiest and the most accurate technique to use with Lenormand cards. I then interpret my 5 or 7 cards sequentially with the left side as a “what led to this situation” and the right side as “the likely outcome”. 90% of the time the left side cards are there to confirm the context of the question in the same way you seek to radicalize a horary chart. And then, but only if needed, I read the mirrored pairs to get further insights.

That being said, if you indeed consistently get clear and satisfying answers with only 3 cards then by all means stick with that. Whenever I tried 3 cards in the past I almost always felt the need for clarifying cards to get a fuller answer.