No one asks for absolute, Cartesian provability. Though what you say is not entirely true. Past events. which leave
physical marks, can be ascertained with 100% probability. For example: a volcanic eruption. We might not know “exactly, precisely” when they happened, but we do know that they DID happen. By this criterion, the alleged “flood” could not be authenticated, since it would have left “indelible marks” which could be seen by geology - so we KNOW that the “flood” in the bible is not true. We do not know “everything” about WWII, but we do know that it happened. The physical evidence is not simply overwhelming, it cannot be denied by rational people. (Yes, some crazy people deny it, but why should crazy people be considered?)
Human actions usually do not fall into this category. Caesar allegedly said “Alea iacta est”, when he crossed the Rubicon. He may have said it, or may not have. In such cases one must rely on witness testimonials. The number of unrelated witnesses, their credentials, their possible biases all must be taken into consideration. When it comes to real serious issues,
only first-hand testimonials are admissible, since the unreliablity of second, or third-hand testimonials is very well known.
They would be “strange” and shocking,
IF they could be authenticated. But there is no way to authenticate them. Even if they could be authenticated, that would not lead to divine miracles, just like Uri Geller’s alleged “paranormal powers” are disqualified as evidence by other stage magicians, who perform the same “tricks” without any reference to the paranormal.
Personally? I don’t. But the question is not my skepticism. I am curious how can one substantiate a divine revelation? Let me give an example. Suppose someone comes and says that she had a “revelation” about the next ten consecutive Superball jackpot winnings starting one month in the future. The revelation would not only tell the numbers which will be drawn, but also the names, addresses, etc… of the upcoming winners. That would be impressive enough to start one doubt about one’s skepticism.