My question to you:

Why is it hard to accept the possibility that there is a primate here in North America?

The woods and forest here can sustain a primate.  Even one as big as 8 feet tall.  When you look at the primates in Africa and Asia, the possibilities are possible.  The geography and climate of Africa and Asia is comparable enough for the possibility here in North America.  The land bridge between Russia and Alaska allowed people to come.  Why not another primate such as Sasquatch?  We have oral history from Native Americans about them.

If you are saying that because we don't have a body there is no way there is a bipedal primate.  There may be several factors on why no body has been found so far by our society.  One is the sheer size of where they live combined with their relatively small numbers is one major possibility.  The other is that our woods and forest has an efficient cleaning system in place to recycle dead animals as quickly as possible.  My last possibility is the remote locations of where they are living.

If they are human smart as I suspect, there may be other factors too.  They have evolved to stay elusive from our society.  With this in mind, maybe they hide their dead from us?  It would make sense.  If they don't want us to know about them and is human smart, then it is possible for them to figure out to hide their dead from us.

We are still finding out more about the animals we know about.  Look at the facts about animals a hundred years ago to what we have now.  It would make sense that we do not know everything and should be open to more possibilities as our science continues to expand their knowledge.

The day we are absolute in our knowledge of our earth and the contents will be the day we will be proven wrong.  Instead of trying to be absolute we should be open to the possibilities.

Go ahead and try to prove scientifically that there are no possibilities of a bipedal primate.  This endeavor will probably surprise you.  The signs and current evidence does point to one living in our forests and woods.