First of all. Satoshi is smart enough to have come up with bitcoin. But let's not forget that Satoshi is, well, human. Just like us! Stop looking at him/her/them as someone who is all-knowing and someone that doesn't make mistakes.

Also, again with the "mining is centralized" argument. Can you expound more on that so we would know how you came up with that conclusion? Sure it became more centralized due to it being harder to mine on personal computers due to ASICs, but calling it "completely centralized" is just pure bullcrap. Have you been listening to Peter Schiff or Nouriel Roubini?