I think the answer is two fold.
1) None of the receivers impressed us enough to where we assigned particularly high value to any of them. I think if most huddlers are honest with themselves, they will agree that this was the one of the weakest WR classes in recent history. I mean honestly, a 5'8' receiver is the first one off the board?!?!
2) There was some serious value in the trenches for our earlier picks, and we obviously didn't feel like adding more "camp bodies", to a position that's already deep with "camp bodies", in the later rounds, so we decided to draft depth in positions that were lacking in such - excluding RB of course, but the running Duck was just to much value to leave on the table.
Coming to post this.