The birthday number system is built the same way most of numerology's number sets are: each digit gets assigned a distinct theme, and the themes are meant to complement rather than compete. A birthday number 6's strength in care and responsibility isn't framed as better or worse than a birthday number 8's strength in ambition — they're simply pointed in different directions.
Content asking "what's the best" is usually chasing something closer to a horoscope headline than a numerology principle. It's a more clickable framing than "here are nine different strengths," even where it doesn't reflect what serious practitioners actually teach.
