Before the question makes much sense the people discussing it need to come to some agreement on what defines paranormal, supernatural, etc. Where does F&B end and "other stuff" begin? I think you have to settle the issues of whether or not extraterrestrials exist and can get here, and whether paranormal / supernatural exists, in a scientific way, before it isn't a question of putting the cart before the horse when claiming bigfoot is any of those.
Just my opinion of course.
As I have said here and in other places, I think the paranormal appearances of events, which are rampant in the body of reports, are most likely the result of "stage magic" rather than "real magic", in other words, it is misdirection and sleight-of-hand, our attention directed elsewhere while the actual trick, which is "normal", is performed without our notice, but we're just too arrogant to admit, even to ourselves, that we've been fooled so we come up with nonsensical and fantastical rationalizations that we call explanations but aren't. I think instinct to interpret rather than stopping at observation trips us up. I think our desire to believe, and to be validated, outweighs our critical thinking. Not always, but too often. And so "woo" was born ...
MIB