That's utter conjecture for the reason that I've underlined. You've also completely overlooked my first and third objections, regarding respectively the work of Bohm and Everett.The notion that there are no deterministic field theories accepted in the 21st century even by just conservative standards is patently false, on account of the fact general relativity is still considered valid for certain types of phenomena.
Deterministic formulas like general relativity exist because mathematically their results are close enough to a result of a probability base formulation (Which we don't have yet) but a Grand Unified theory will be by the nature of quantum physics be a probabilistic model.
That's false. Dark interference fringes of light are precisely neighborhoods that surround locations where the probability of observing a photon from the given source is in fact exactly equal to zero. That's an elementary result of quantum mechanics!The simple fact is that no event can have a predetermined probability of 100% or 0% therefore the universe can not be deterministic in nature.
As the works of Bohm and Everett both show, the issues that you're raising have no bearing on the question of whether the universe operates deterministically.
But really, the question of whether the universe operates deterministically is irrelevant to the question of whether words like how and why are meaningful, as I'll explain below.
If I'd said that "why" should have any association with morals, you could ask why I think it should have that association. In fact, though, what I've been saying is that "why" shouldn't be restricted to such an association.The better question is why anyone should allow the term why to be hijacked to have only senses such as "for what moral reason".
What makes you think "why" should have any association with morals.
No, sorry. To the degree that science does anything at all, science answers both how and why. It does both. The assertion that phenomena must conform to any of our theories is one not proven by science; that assertion can never be proven. All science can do is provide an estimated confidence level that our theories agree with natural phenomena. That confidence level can theoretically approach 100% but will never actually equal 100%.George Carlin believed the Universe existed to create plastic. The question of "why" is imposed by humans who want to impose their own views on the Universe.
If I were to ask whether you could say why the tides go in an out without ever a miscommunication between them, would you answer that it's largely because of the moon's gravity, or would you pedantically nitpick the question?
Gravity explains HOW the tides function not why. Asking why tides exist (the purpose) is pointless because they are a natural phenomenon that simply happen because of circumstance.
In that sense, science can't even completely assure us that what it says with respect to how things are occurring is really how they are occurring. But, to the degree that our theoretical models are supported, how is a question that has an answer, and that answer is relative to the supported theory, and the same thing goes for why. "Why?" exists in the context of our supported models as meaning, "By what theoretical principles is the behavior predicted?"
Both how and why are theoretical concepts.
Additionally, just because some questions have answers in the context of our theories, it doesn't mean that all questions have answers. For example, quantum theory explains why interference patterns have the shapes that they do very nicely. What the theory doesn't do is answer why individual photons do what they do individually. That's beyond the scope of what the theory is capable of doing. That still doesn't mean that it doesn't offer an explanation for the shape of, say, interference patterns, in addition to describing what that shape is.