So, one can assume that 50% of Leos could have night charts, so the "dark side", going by your logic, would be pronounced in them? Ummm...
I don't know. It might make an interesting study though, for anyone who's interested enough. Why automatically rule it out? Aren't you, yourself, using sect to determine which planets are on team Native?
This wouldn't mean a "bad" person. Just someone who prefers to remain private, and less likely to desire fame and recognition.