It is possible that the article is not accurate. However, that is an ad hoc hypothesis. You need an independent way to determine that for a valid hypothesis.
Now, the invocation of “simpler explanation” is invalid. The idea that the “simplest explanation is the correct one” is not correct. First, it is often ascribed to William of Ockham. That is incorrect. It is from Isaac Newton. Second, there are severe philosophical problems with the formulation. Third, and most importantly, it is empirically wrong. Very often (especially in biology and human behavior) the simplest explanation is not correct.
As you noted, that is a** personal decision. You can assign any level of hurdle you wish. However, if you are trying to get at the truth, then you should assign the same **level to any question. The idea that “extraordinary claims require extraordinary evidence” does not stand critical evaluation.
That is not appropriate anyway. What we have here is a historical claim, and a singular claim at that. There is nothing to indicate that ANY and EVERY person who prayed and decided not to eat or drink would be healthy. The claim is that this particular person did. So all we can do is look at the historical evidence. What we have is what we have.
IF the accounts are true, then it looks like we are faced with a sitiuation where we do not know of any process in the universe that would account for the situation. That’s where we invoke “miracle”.
OTOH, it’s possible to doubt the accuracy of the accounts. I don’t see any independent reason to be able to definitively say the accounts are false. That is, I don’t see any documented overt bias on the part of reporter, any independent documentation of the dishonesty of any of the principals, etc.
As a scientist, I have to go with “anomaly”, which is short for “I don’t know; it may or may not be true.”