Point went right over your head. <insert obligatory jeff dunham routine>
The result of what you suggest is that you have to trade out another stat for Toughness. This doesn't really happen with resilience.
The stats in GW2 come with a cost. If you stack ALL Power and Precision, you're not going to have Toughness, or Malice, or Expertise, or Vitality, or Compassion.