@resonancer It would be impossible to find a single person, maybe, but not just ANY person. There's a difference between not being able to find Joe Blow, of Tacoma, Washington who is hiding somewhere in the woods versus not finding a single human at all in ALL of the Cascades after 30 years of looking.
And it doesn't really matter if Bigfoot "doesn't want' to be found, and is "avoiding" us. So are plenty of other large fauna, like bears and moose, and we've got enough photos of them to make a new calendar every year.
A single sasquatch may be able to avoid the dragnet, but not ALL of them. To get a meaningful sized population that can breed enough to keep the species alive, and also not inbreed it to death, would mean you'd need THOUSANDS of these things, and that's' where the main evidence problem comes from for me: explaining how nobody ever finds the remains of a dead one of a population large enough that it should be producing, well, dead ones. Aside from accidents like getting hit by a car or drowning, these things have got to age, get old, get sick, and die like everything else. Yet, no one has ever found a carcass? In any state? From fresh to fossil? Sorry,no sell.
Humans, nominally the smartest organisms on the planet, eventually make mistakes, so even if you want to propose human-level intelligence, you still haven't explained why they have this super ability to crumble to dust the instant their heart stops ticking. Unless you think there's only one, in which case it'd have to be immortal too on top of everything else that would explain the lack of tangible, observable proof.
The loopholes you have to keep inventing to explain the total lack of evidence that should be there is exactly why he's mythological, only a magical being could exist in the thousands and yet leave not a conclusive trace.
I used to be a big (ha) Bigfoot proponent as a kid, but, as I grew up, no matter how much I didn't want to believe it, I had to admit, if science and logic are followed rigorously, no claim of Bigfoot passes the test of why we can't find one.
That said, I'm more than willing to believe in deep-sea creatures we haven't found yet because of the challenges involved in going looking for them (We've put more men on the Moon more often than sent to the bottom of the Marianas Trench) but a land-based giant ape indigenous to North AMerican woodlands? Not a chance. But I'll happily eat crow if someone drags one into the Game Warden and asks for a tag.