crash in planet (or new continent?) and proceed to expand while decimating native life?
in any case, good game.
the issue then, is how to decide what "as much as we can" even means; if we do "as much as we can" but this kills us, then it will have turned out that we indeed could not do that much
Well, if you take this statement literal, then I think they do contradict each other - see my cancer example. But in the way you apparently meant it, then no, there is no contradiction.
In a typical game the player doesn't decimate them, if anything they make the native life flourish.