The thing is though, if anyone ever had such convincing evidence, no one would need faith anymore.
I disagree. Knowing for certain that God exists and trusting in him are two very different things; in particular, when the realities and vagaries of existence, suffering and death loom before you and stare you directly in the eyes.
You may know with 98% or even very close to 100% certainty that the major surgery you will be undergoing in a few hours is survivable, but for any one individual to have sufficient trust in the surgeon and hospital to undergo the procedure requires something more than knowledge.
I suspect there is a very good reason why faith – and not knowledge – is the required virtue regarding our salvation; and that reason is an existential one rather than an intellectual one. Our existence at its core is more than mere intellect.
Possessing certain knowledge ABOUT God is quite a different matter from knowing or apprehending God directly, or trusting and loving him.
Objective knowledge ABOUT someone (even when 100% certain) is not the same as knowing them intimately. Trust or faith is a necessary condition for moving past mediated knowledge (knowledge about) and moving into direct personal communion.
I would argue that God, too, has his standards, so knowing God intimately is not solely about our taking the initiative, even when we know with 100% objective certainty that God exists. The crucial piece is God revealing himself to us directly and for that God does the preparation. It is not something we alone can accomplish.
Again, we may know with absolute certainly that God exists, but still not know God.
AND we cannot know with absolute certainty that God exists unless we know God directly and personally. Otherwise, we really have no idea what we are talking about when we say “God exists.” Ergo, certain knowledge of God cannot completely depend upon any proof, but upon God revealing himself directly to us.
We cannot truly know THAT God is without knowing WHO God is. This is why faith is a supernatural virtue and not mere belief in the absence of physical evidence or even when that belief is fully flushed with physical evidence.
Matthew 16:15-19 Revised Standard Version Catholic Edition (RSVCE)
He said to them, “But who do you say that I am?” Simon Peter replied, “You are the Christ, the Son of the living God.” And Jesus answered him, “Blessed are you, Simon Bar-Jona! For flesh and blood has not revealed this to you [not even Simon Peter’s own neurological system and brain], but my Father who is in heaven. And I tell you, you are Peter, and on this rock I will build my church, and the powers of death shall not prevail against it. I will give you the keys of the kingdom of heaven, and whatever you bind on earth shall be bound in heaven, and whatever you loose on earth shall be loosed in heaven.”