No, I don't feel crazy. Just honest.

I have no idea if the tree is still there when I cease to exist. I just go with that assumption out of convenience.

This degrading of subjective experience as a minor detail rather than a fundamental aspect of reality is one of the core sources of confusion in western thought IMHO.

I'd argue we must go with these assumptions out of necessity rather than convenience. I don't have any broad strokes to offer on western thought, however.