Contra Metaphysical Idealism

[Angrboda]

Every time I step outside, my street looks the same. What those materials 'ARE' is unavailable to me. Calling them ideas is no more helpful than calling them fields, relationships of particles or blahverts when their essential nature cannot be known.

Given a lack of access to whatever objective reality may/may not underly our experiences, then why wouldn't the most sensible choice be to take experiences as brute fact? I do not know if I'm in the Matrix, a BIJ, the Mind of God, or a physically monist reality. I do know that I have experiences. Why, then, shouldn't I categorize all my experiences as such...

As such? As what? What are you categorizing experiences as, with the emphasis on the 'what'? If you say ideas, you've just replaced one undefined term with another. What is an idea, where does it live, what is its substance, and how do you know whether or not all experiences are of the same kind of stuff?