I think people are critiquing it in the wrong way. It isn't so much a game as it is just a way to virtually explore Africa, as if you were a photographer.
I won't be getting it, although I did like Pokemon Snap back in the day. Just not into that thing.
However, I respect 1up's review a lot more. They gave it a B+, and seemed to review it based on what the 'game' is, and not on what it is not. Most critics are going to have trouble recommending a game in which there is literally no point, objective, or story, with little options unlike an open world game.
IGN giving it such a low score is reason enough. It seems as if the game is good for what it is, but going into it with the wrong opinion really screws things up.