I'd sat that Patterson's outcome was not proportionate to how long or how well he was looking. Really and truly, the guy just hit the number is all. Sure, he had to be in the woods with a working camera, but after that he was just rolling dice like everyone else. Time has shown it was an extremely rare event and we shouldn't count on it to be repeated, or draw any conclusions because it hasn't been yet. That sounds extremely pessimistic, I realize, but there it is.
Maybe it was even a one-off for all time. None of us can say for sure, but it certainly hasn't been repeated that we know of. It might be so rare that the efforts of a multitude greater than those now being expended are going to be required to even have a chance of it being duplicated.
Some confuse this lack of duplication to be evidence of fraud, supernatural abilities or even the extinction of the species. To feel that way, I think, is to overlook the nature of the event itself as informed by the collective experience since the film was shot.