I would tend to agree with what you say here, with some clarifications. The first one is that I think it's a matter of _models_. What I mean is that digging un

I would tend to agree with what you say here, with some clarifications. The first one is that I think it's a matter of _models_. What I mean is that digging under the surface of materialism, what we'll find is pure physics, and currently physics is based on incomplete models or models based on unreachable or non-interactive constructs. Many-universes, 26 dimensions, dark energy, collapse of wave function... Placeholder ideas to make the math work. So, idealism is preaching that there could be the possibility that our current holes in knowledge and understanding might be filled with mind stuff rather than matter stuff. Sure, it might require us to flip the causality relationship between the two, but I don't see that as a fundamentally different way of guessing at what else might exist, and just as materialism has descriptive and predictive power based on abstract, unreachable constructs, so can an idealist worldview. With regards of having to act as if materialism must be true, I would agree but it depends on at which scale we operate. Meaning, I doubt there could be any other functioning paradigm to go about our daily life and to progress practical science. But for things such as "why is there stuff instead of not" or even more tricky questions such as "what's the meaning", I'd look elsewhere.