Yes you are. You really don't know what you are talking about, if you think those matches didn't matter.
Blimey JP, you really are like a bear with a sore tooth.
So let's look at those two group matches that you seem to think were ever so important, Ireland vs SA and NZ vs France. Imagine if the results had gone the other way, so that NZ and SA had won rather than France and Ireland. Let's see what difference it would have made.
So what actually happened was Ireland and France won those group games, with Ireland, SA, NZ and France qualifying for the quarter finals with Ireland playing NZ and SA playing France.
So what would have happened if SA and NZ had won those group games. Well, err, Ireland, SA, NZ and France would have qualifyied for the quarter finals with Ireland playing NZ and SA playing France.
If those matches had been reversed in terms of results it would have made literally zero difference to the unfolding of the tournament.
And last time I looked SA and NZ (who lost those group matches that JP seems to think were critically important) will be contesting the final next weekend. Those group matches were clearly irrelevant.