The problem is that prior to ~1990, there were lots of supposed photographs of Bigfoot, and now there are ~none. So Bigfoots would have to previously been common close to humans but are now uncommon, or all the photos were fake but the other evidence was real. Plus, all of that other evidence has also died out (now that it’s less plausible that they couldn’t have taken any photos). So it’s possible still that Bigfoot exists, but you have to start by throwing out all of the evidence that people have that Bigfoot exists, and then why believe in Bigfoot?
The problem is that prior to ~1990, there were lots of supposed photographs of Bigfoot, and now there are ~none. So Bigfoots would have to previously been common close to humans but are now uncommon, or all the photos were fake but the other evidence was real. Plus, all of that other evidence has also died out (now that it’s less plausible that they couldn’t have taken any photos). So it’s possible still that Bigfoot exists, but you have to start by throwing out all of the evidence that people have that Bigfoot exists, and then why believe in Bigfoot?