One of the biggest reasons why I don't care about finding other intelligent life is because humans already move to fast or too slow. It's mitigating to not accelerate too fast, to slow or become to big or too small. You would de-couple life from it's lifeline.  Resources in my opinion are far greater a need for survival. Also assimilating would work too but obviously there is risk of war, so if that's what you want then I guess that's what you want.