When people normally talk about a unbiased perspective they are talking about objectively presenting, discussing or evaluating a given topic (within the realms of what is possible).
Saying it is impossible (which I think is tenuous at best, but I for the purposes of argument I will concede it) is not seeing the wood for the trees. As long as people are trying to be objective (even if they fail) it is much better than just giving up and just not even attempting.
Many people seems to think of things in terms of absolutes. Just because you cannot being completely objective it doesn't mean that one shouldn't try.