I do understand that it led to better FP which pinned SD deep, but the Jets D already demonstrated that they could keep SD from scoring even when they had great FP. You don't seem to understand that Mark failed to covert a 3rd and 3 on the same drive which forced them to punt instead of putting points on the board. That one 3rd down conversion doesn't change Mark's average play that day.
The regular season is not the playoffs, but it just shows that he had the ability to make the kick and it wasn't an unreasonable attempt. The 55 yard FG he hit that year was not a new career long. He hit a 57 yard kick against Tampa the year before. Even disregarding that kick, he still missed two pretty easy kicks.
If you want to argue that the game changes and the Jets wouldn't go into prevent, then you have to accept that maybe the game changes in SD's favor as well. Maybe SD isn't throwing the ball when they were pinned on their own 5 if they were up 10 instead of just 4. If that turnover never happens, whose to say that the Jets score if they didn't have the ball in SD's redzone? We can play the what if game all day, but it goes both ways. Bottom line is that 3 missed FGs in a 3 point loss is a big deal.
I think the better team won that day, but Mark did very little and would be last on the list for reasons why they Jets won.
I'm sure Mark would appreciate it if he knew Junc was still pumping up his average play.