That's a nice theoretical claim, but in practice it is just plain false. Two macroscopic objects, like a human and a cup of coffee, at room temperature, entangl

That's a nice theoretical claim, but in practice it is just plain false. Two macroscopic objects, like a human and a cup of coffee, at room temperature, entangled? Give me a break. That idea is pretty common in (so-called) many-worlds interpretations. In such interpretations, the wavefunction never collapses: the "collapse" of the wavefunction is just the observer becoming entangled with the system. This, of course, has all sorts of disturbing implications, but arguably still makes a lot more sense than any other interpretation.