As we all know, in algebraic notation, we usually suppress the notation for pawns. That is, unless they are capturing something. Then, for some reason, we must notate the file of that pawn. For all other moves, you only need to notate the file (or rank, or both) if multiple pieces of the same kind could move to the field in question, so that this extra information is necessary to avoid ambiguities.
For instance, the Scandinavian defense usually goes something like
1. e4 d5 2. exd5. Why not just