literally by definition "material conditions" IS what exists, including both the base and superstructure. The internet is material, including cults on it, despite how disconnected from reality they might be. "Material" doesn't just mean something that is physical.

I see what you mean though, that liberal politics is delusional and leftists shouldnt try to engage in it. However, we definitely should never stop trying to make sense of and analyze material conditions, it is impossible as well.