maybe for 84k years, the conditions were never right for making fossils of these dudes. plus i don't believe in carbon dating because i don't understand it.
Wait that's you right?
I think that these could be a reasonable explanation for Bigfoot being present in legends. Gigantopithecus species were found in Asia, and it is a pretty widely accepted theory that aboriginal Americans migrated to the Americas across the land patch where the Bering Strait now is, and down through all the way to South America. While it is a pretty big stretch, and I wouldn't (and wouldn't expect anyone to) believe it, I think that something that could explain it is that ancient humans passed down legends originally centered around Gigantopithecus and the legends continued across the Asians' migration patters. This would be supported by the fact that the majority of bigfoot legends among aboriginal peoples are in southeast Asia, east Asia, and west coast America.
Also, about fossils... ever notice that there are tons of dino-fossils from before they went extinct, but none from the actual date of extinction? Whats up with that?
The basics of carbon dating are this: Elements decay at a constant rate, the half life of an element is the time it takes for a single atom of an element to decay to 50% of its original form. The decay of carbon is relatively fast so it is actually only used for things about 50,000 years old (or so im a little fuzzy) and it is only applicable to remains of organisms (that were made of carbon obviously lol). By looking at the decay of the carbon present it is possible to estimate the age of the thing in question. Now you might ask well how do you classify things older than that? (because most things are) well there are many atoms that we can use and some have half lifes of a billion years or more. To better understand how half lives are used it goes like this:
100%--->50% in one half life ------> 50(.5)= 25% at the second half life -----> 25%(.5)= 12.5% third half life etc so whatever % of the molecule is remaining they can calculate the halflife or what life it is between etc.
but I do agree that it is very possible there were stretches of time that conditions were not right to make fossils and there are many species that probably never made it into fossilized form as it is such a rare occurance.