Will we do it at some point anyway or do we need to be trying a lot harder now to achieve it? On a similar note, does planetary protection of Mars matter? Should we be THIS careful, or should we just go up there and explore in the hopes of colonizing it someday and nevermind what is there now?
My own thought is that a) we need to be trying harder and b) we can be careful enough to explore what is up there initially (just in case some alien form of life is right under our noses- we don't want to miss it), but our MAIN goal should be colonization. At some point we need to forget planetary protection and start colonizing!