the fact that 12 is both a multiple of 2 and 3 always felt kind of odd to me i don’t think 12 belongs in the 3’s but she’s there anyway, she’s a bit of a social butterfly, she fits in anywhere kind of thing.
Three is a famous number for a reason. There's inherent tension in something that cannot be divided in half.
Without tension, a bow cannot launch an arrow.
Even from a completely non-metaphysical perspective, it's nice to assign meaning to patterns.