My English is poor, and it was the opinion of a complete amateur in quantum mechanics, so I would like to digest the content I wanted to say and organize the points of my brain inside.
As a note to myself...

1. Comparing the way of thinking in physics up to the 1970s (in my case, it was electrical and electronic engineering (digital electronic computers)) with the way of thinking in recent quantum mechanics reveals a fundamental paradigm shift.

2. When thinking about the question of “existence” by philosophers before Socrates, especially Parmenides, the achievements and ways of thinking of quantum mechanics and quantum computers in cutting-edge scientific technology are very helpful. below:

3. From the 70's to the 90's, science and technology were simple.

4. AI has also achieved remarkable results in recent years, but the basic way of thinking has not changed since the 1990s. ChatGPT is also basically a neural network and deep learning way of thinking.

5. Quantum Mechanics: Quantum computers represent a paradigm shift in that they are "non-digital" in the age of "digital".

6. Both the Internet and quantum mechanics are a paradigm shift that is fundamentally different from the scientific technology (single layer) of the 70s to 90s in that they are both “multilayered structures…meta/meta-meta/…” ways of thinking.

7. The point that the problem of "observer" in quantum mechanics is included in the discussion space (I don't know if it can be called "relativism"), and the point that the development of quantum computer technology with that perspective has started is a paradigm shift.

8. Quantum mechanics deals with the facts of phenomena. What Parmenides otherwise is dealing with is the basis and the reason for that "fact". The meta-hierarchy is one different. It's a higher-level meta.
   8-1. For example, suppose that the neutrino ``fact of the phenomenon'' is mathematically elucidated by quantum mechanics (a mathematical ``hypothesis'' is established without any contradiction). Even if the "hypothesis" is further investigated, it is a problem at a different level from the grounds and reasons that establish the "fact of the phenomenon".

9. Therefore, quantum mechanics, which is established in the consistency of mathematical "hypotheses", cannot solve Parmenides' "existence" problem, that is, it cannot overcome it. Because the hierarchy of the problem is different.

10. However, Parmenides himself has only raised the question, and no human being has yet solved the question of the grounds for Parmenides' "existence", and we have not even seen a clue.

11. However, beyond the question of quantum mechanics/modern physics, it is expected that we will approach the question of the basis of Parmenides' existence.