[Hawthorn]

Neither QM nor any other scientific theory is literally “true” in the metaphyscial sense.

Rather, each theory is basically an abstract model that uses simplifying assumptions to explain and predict events observed in the real world.

The assumptions themselves need not correspond to strict standards of “reality” as long as the predictions of the theory or model are accurate enough for whatever standards of utility we might impose.

[Reily]

True ! True from “theory” we think we understand - Newtonian mechanics/dynamics; to quantum theory or even biological theory - where we think, maybe, we might understand something about it; to theory where we're just whistling in the dark like M-Theory (a String Theory variant)