Rewriting this Scene

Instead of Rocket sparing the High Evolutionary because he's a "Guardian of the Galaxy", I think it would've made much more sense if he had said, "I rather let nature take its course, something that he never wanted to do.", because the High Evolutionary's main motive was to speed up the process of specie evolution instead of just letting them grow naturally into intelligent sentient beings. Rocket killing him immediately would've satisfied the High Evolutionary's motive, but sparing him would've disrespected his own beliefs, which was to grow live and die naturally as a part of the natural cycle of life.