You're missing the point: I'm describing the different standards of evidence associated with non-hard-science studies.
Well the word "evidence" means the same thing whatever the subject.
What is at a
"different standard", is (i) the quality and amount of truly reliable & relevant data that it's possible to gather or to discover. And (ii) whether or not it's possible to use such data to form a robust & reliable hypothesis which can be tested in various ways by different reliable techniques, methods and calculations.
Outside of core science, the problem is that in many subjects the claimed data is not reliable or credible at all in the first place. And if you use such poor and unreliable data, then any conclusions drawn from that data are likely to be seriously unreliable or even completely mistaken/untrue.
In the case of biblical studies, the data offered by reading the bible, is truly atrocious. You really cannot use data (what for simplicity we often here call
"evidence") as massively unreliable as that, where a huge mass of it has even been proved entirely false and physically impossible, and still hope to conclude anything more than the most tenuous and doubtful of conclusions.
The best you can conclude from data like that (i.e. the bible) is that Jesus
might have existed (at least in some sense or other). Because after all, people did exist in 1st century Judea, and anything
might be possible.
But what you certainly cannot conclude (except by naivety or dishonesty or by the wishful thinking of "confirmation bias"), is that such data is good enough to show that he
probably existed (i.e. meaning, greater than 50% likelihood), or as Ehrman and his colleagues claim, that he "
certainly" existed.
IOW - as I’ve said here many times before - he
might have existed, but to show that would require something a great deal better than the utterly useless and massively unreliable “data” known as the bible.