Factually incorrect. Although there's no single reason we weren't seeded second, if we had received a win for the Seahawks game as we should have, the Packers would have secured twelve wins heading into week 17, placing them ahead of San Francisco regardless of how the Minnesota game worked out.
Hypothetical what-if are factually incorrect, you're right. However pointing to the situation that caused us to lose out on the bye and saying: "man, if we'd have played that differently", is not.
You can't point to a game and reasonably say "if that one call wasn't made...", because then you get into a ***-for-tat mindset. Yes it was a poorely officiated game, if we'd have had different officials it would have been a whole nother game. Who knows, maybe we wouldn't have even been in the position to lose because we wouldn't have gone up on a Jennings TD that he committed Off-Pass Interference on.
Fact remains that we still could have secured a first round bye and a home Divisonal game after that game, and had the chance to do so through week 17. We didn't get it done. The only way your argument holds any water, imo, is if the Packers would have been eliminated from the chance of finishing with the 1st or 2nd overall seed by losing that game; that is not the case.