These statements conflate, as idealists do, epistemology and ontology.
What we know "for sure" has no bearing on what's real. These are entirely separate questions.
What an ape might, or might not, feel certain (or any which way about) says nothing about where an ape finds itself. Of course, this is a great injury to our ego, and sense of power to determine the nature of the world by our mind alone -- but such is life.
The world is not human, not at all like a human, and nothing about it follows from us at all. The world is not made in our image. Consciousness is a derivative, secondary phenomenon which is a measurement process occurring in the body of an ape, and whatever it manages to measure with any clarity, has no impact on the nature of that world.