Skepticism in the world of bigfoot, in and of itself, is a healthy and necessary trait. Until someone plops a body or part thereof onto an examination table, it's all sus (suspect).
Trogluddite's excellent above post said it well. I, too, consider myself a skeptical believer. But, hoo boy, there are LOTS of issues with what's taken for "bigfoot canonical lore." (Hey, I coined a new phrase!)
Let's face it: Us bigfoot proponents can't blame disbelievers any too much. The biological necessities make it difficult to explain how enormous, bipedal primates can make a living without revealing their immediate whereabouts that should lead to their discovery.
So rather than grouse about those darned skeptics, realize just how much we're asking the general public to accept on faith.
Footprints? Great. Shouldn't a skilled tracker be able to follow them to their source?
Tree structures? Like Norse, and I'm not speaking for him, but I ain't buying it. Extremely circumstantial.
The amount of daily caloric intake necessary to sustain a five-hundred lb. primate should leave traceable effects on the environment, and along with their footprint impressions, reveal their location to a tracker.
These are some of the nuts and bolts that fuel good, honest skepticism. I don't think it's fair to criticize someone for that. What we skeptical (and hopeful) proponents dwell on are the compelling first-hand accounts, recordings of calls and chatter of unknown sources, and a handful of films/videos, especially the renowned Patty (she's a rockstar!)
So here's to skeptical, hopeful belief.