Not pretending that at all. Most of the people who wrote accounts about Yeshua probably believed them to the core. That doesn't mean their accounts were accurate.
From that statement, I can say that you don't believe any of the "written" history unless there are signed documents to back it up? You don't believe in the ancient cultures because there is no "accurate" accounts? You don't believe anything written about the middle ages because there are no "accurate" accounts?
I am so relieved, because for sure you can't "believe" in evolution, because there certainly aren't any "accurate" accounts of any of that BS.
Everyone is prone to error, and of course I'm not going to take just one historian's word at face value.
Most people look at corroborating evidence when they want to determine whether something is (at least probably) true. And yes, there's all sorts of non-written evidence about ancient cultures, the medieval period, and even evidence that supports Darwin's theory (imagine that!)
And surprise, that doesn't mean that Darwin explained it all perfectly, only that it's the best explanation for the evidence that has been developed so far.