There is a lot about QM that nobody understands and no doubt even more that nobody knows. It is not honest to claim QM is a foundation on which all modern advances owe their existence. QM may touch a lot in the modern world, but it no coubt had very little to do with providing the essentials to new developments. People say the same thing about evoliution, that it contributed essential elements to neartly all modern advances. Those claims are simply not true.
This is a sampling of why I question the speculations of QM:
Creation and Quantum Mechanics | The Institute for Creation Research
Third, the Casimir Effect appears to show the existence of virtual particles that exist in a perfect vacuum. An infinitesimal pressure has been measured within a laboratory vacuum, apparently from these ethereal particles (Baker, 1997). The virtual particles are sometimes further used to explain the origin of the universe. Thus it is said that a quantum mechanical fluctuation of virtual particles long ago gave rise to the big bang expansion. However, this origin explanation fails for at least two reasons. First, the big bang theory postulates no preexisting space or vacuum. Hence there would have been no place for virtual particles to fluctuate. Second, virtual particles, if real, form as matter and antimatter in equal amounts. However our universe appears to consist almost entirely of ordinary matter. Antimatter is distinctly rare.