It's relevant to the thread at hand. That's what matters.
I also don't believe that any one person gets to decide what is deemed relevant on a public discussion forum.
The phenomenology of both bigfoot and UFO's is eerily similar, but that's a discussion for another time, and most likely, place.
There are certainly photos that exist in the private domain. The PGF is a whole mess of them. People don't like to take photos and have them wind up in public domain, or are you not talking about copyright?
The evidence that Patty is the real thing has been tested. In fact, attempts to show that she was a suit have backfired, and actually shown that she was the real thing in spite of themselves. So we are in fact beyond that. Whether a person can **accept** that is an entirely different matter! I think a lot of people experience cognitive dissonance as the reality is too challenging for their worldview.
I think I know why they do not teach Jefferson in school any more. We are past the point where Jefferson thought that the populous would rise up against the government. Permits to take a picture? He and other founders of this country are likely spinning in their graves. The word sheeple comes to mind. "Heavy Sigh! Fade to black."
That's not likely at all considering we're talking about an entire species and not just alpha males.
Newborns, juveniles, males, females, young, old, deaf, blind, disabled, etc, etc, etc...
I guess the general argument is that, all your points not withstanding, if bigfoot are just big, North American wild primates ("wood apes", if you would), then we should be getting some pictures of them just as we get pictures of all the other indigenous wildlife of the area. If not, we are faced with the possibilities that either bigfoot do not exist, or that they are something more/different than simply another big ape running around.
Edited to add- All this assumes that no such legitimate and/or definitive images exist in the public domain. We can not be certain what photos (if any) are held by private parties or by the government.