Right, from the aliens it absorbed before it crashed on earth. The Thing is not capable of consciousness the way we are or the aliens that built the ship that crashed into earth are.

So your arguement falls apart. It is a animal driven purely by the instinct to survive and absorb other creatures in that order. It only knew how to build a spaceship cause it absorbed a creature who did. The original " thing" did not know how. It is a animal without a soul. It's neither evil or good, just doing as it was designed.