Why don't people ruled by the same planet think al

Has anyone ever wondered why don't people born under different signs, but ruled by the same planet think in the same way? Like Aries and Scorpio ruled by Mars, or Libra and Taurus ruled by Venus.. if we're ruled by the same influences..why don't we come to the same conclusions and think like each other.. what makes each sign especially distinct from the other?
I thought about Libra being masculine and Taurus being feminine making some effect on their patterns of behaviour for example..but it baffles me.. I don't at all think like my Taurean counterparts.. Is this true of other signs?..and what makes this so?

Topic Reads: "Why don't people ruled by the same planet think alike?"