I’ll willing to bet that Cody Parker would strongly disagree with you.
Double-Doink!
I'm guessing you mean Cody Parkey of double-doink infamy. I have no idea what Cody Parker or Cody Parkey would think.
What I do know is that a typical NFL kicker will make a 43 yard field goal somewhere around 75% of the time, give or take. The other 25% or so the guy will miss. That was one of the latter. If he'd made it you could say the same thing. The fact of the matter is few games come down to a last second field goal. Crosby had one with a 90+% make probability. Do with that what you will.
I think you're failing to make a distinction between execution and probability. Did I say special teams execution is unimportant? No, I did not, because that would be foolish. Is it probable that a special teams play will affect the outcome of a game? No, it is possible but unlikely.
It's a string of touchbacks, fair catches and short run backs. Like I said at the outset, Job #1 is don't fumble, basic execution. Job #2 is tackle, more basic execution. Anything outside basic execution is unlikely gravy or unlikely misfortune. A couple of ten yard punt returns does not qualify as impact, nice to have but not a game changer.
FG teams do what they do with certain probabilities. More and more teams forego the long FG and go for it on 4th. the down which gives you an idea of how the league has gotten smarter about these probabilities. A 65 yard punt is as likely as not to get you a touchback or a 15+ yard return coming back the other way.
To sit here and predict a long kick return, a ST fumble recovery, a blocked kick, an on-side recovery, etc. is a poor proposition.