I agree - but you asked why we take X for granted - meaning, why do we accept it as true without examining the relevant evidence.
No, I am not an evidentialist.
I think that in many cases, believing things “on the grounds of evidence” is fallacious reasoning to begin with.
It is only the most mundane issues, like checking whether there is a pair of red socks in a drawer, that one can reasonably talk about “believing something on the grounds of evidence,” as in “I have thoroughly examined the contents of my sock drawer and found one pair of red socks in it. I therefore have good grounds for believing there is a pair of red socks in my sock drawer.”
One can prove or evidence something only in a closed, self-referential system. Meaning that in order to “see evidence for something,” one believes beforehand that the concepts and methods one is working with are valid and adequate for the purpose.
For some mundane purposes, this approach is good enough.
But when it comes to topics where there isn’t an agreement on or commitment to (!) a particular set of definitions and practices, an evidentialist approach is simply misleading if we try to use it before acknowledging its nature.
Religious topics are a parade example of where such an agreement doesn’t exist or people discussing said topics aren’t committed to a particular set of definitions and practices.
The problem isn’t that there is no evidence for God or, for God’s benevolence, or for reincarnation etc.
The problem is when people discussing these topics are operating with definitions of “God” etc. that are different than the definitions that those operate with who believe that “God” exists etc.
Basically, the two camps are using the same words, but take them to mean different things. So it’s no wonder they can’t communicate.
By definition, we’re talking about fallacious reasoning.
That said, the available evidence for the truth of reincarnation isn’t any different or better in Eastern culture than it is in Western culture. And some theories about what happens to us after we die are objectively less likely to be true than others.
Talking about something being “objectively less likely” requires absolute, objective knowledge; it requires knowledge of the whole set of phenomena one is talking about. Without knowing the whole set, it is impossible to ascertain probability.
And please note that I am not trying to bring home the claim that this or that particular Christian doctrine is the one and only right one.
My approach is “How not to worry about things unnecessarily and how not to be perplexed by statements or questions.”