I always find it pretty amazing that evidence for God's existence is dismissed because of Occam's Razor, and turned into an assumption.
That's not what's happening here.
The naturalistic methodology of science is a common tool of skeptics even when it comes to analysing spiritual books like the Bible. God and the supernatural and prophecy and miracles are usually presumed not to be true.
Maybe you should ask yourself why that is. It's not because of a "scientistic bias" against the supernatural. It's because supernatural claims have repeatedly demonstrated themselves to be false.
How many claims of miracles turned out to be hoaxes? Pretty much all of the ones we could properly investigate. When all of the miracles we can study are fake, then it's rational to conclude that any new supposed miracles we find are likely to be fake, too. That's called prior probability.
This is really the main reason that the writing of Biblical books can be put hundreds of years after what the Bible insinuates. Because the prophecies in the books are not true and so the book must have been written after the prophecies.
This is not only a strawman, but it's a strawman of an argument I didn't even make here. Do you need me to answer for every single skeptic in existence before you're going to be open to having a discussion?
Prophecy in the Tanakh wasn't even meant to foretell the future. They were meant as warnings to the audience. Also, all of the copies of the prophecies we have do have later dates than what the prophecies are about, which we can demonstrate using a variety of archaeological and historical tools such as carbon dating.
You're the one starting with a conclusion and cherry-picking the evidence to fit it. Methodological naturalism demands that we form our conclusions based on the evidence, instead. That's why it contradicts what you believe; you're demonstrably wrong.
Or when it comes to prophecies about Jesus that happened, it shows that the gospel authors must have made up the story of Jesus to fit prophecy.
That would be a ridiculous claim given that Jesus didn't actually fulfill any prophecies.
And when Biblical prophecy still comes true in this age, the prophecies are too vague and could mean anything.
You think otherwise, despite the fact that people have interpreted various supposed "prophecies" as "obviously" being fulfilled by any number of events for over a thousand years now?
So the likelihood that the voice that says He is YHWH and tells you the future, which comes true, in a culture where this sort of thing has happened in the past many times and in which YHWH saved your people from slavery in Egypt and is now your God and King, is 50% less likely to be YHWH than to be one of the countless other possible explanations you say exist.
Actually, if you're hearing voices, you're probably suffering from psychosis like all of the other supposed prophets we have in mental institutions right now.
Of course, if the future prophesied by those voices does come true, then there's probably something more going on. However, to just blindly believe the voice in your head when it claims to be Yhwh is completely irrational.
Even within Christianity, many monks and theologians would sooner say that you're falling prey to "prelest" and being mislead by demons who falsely claim to be God. So even if I'm being the most charitable I possibly can and I'm just giving you, for the sake of argument, that we can rationally assume Christianity to be true, then prophecy is still not evidence of God.
What is the probability that this "prophet" is just able to see the future accurately do you think? 50% by default I guess. Surely half of us humans can do that.
If we've already proven that the prophet's prophecies have come true, then we've already proven that they're prophesying the future.
If you're asking me what I think the probability of someone being able to tell the future is, regardless of whether God is involved in the process or not, I would say 0%. It's completely impossible. I'm only entertaining the idea for the sake of a thought experiment to demonstrate how, even if it wasn't completely impossible and we could show that it's happened before in the past, it would still not be evidence of God.
That's because you don't understand what evidence is or how it works, to the point that you think methodological naturalism is an anti-supernatural bias.