The answer, like so many of things to do with writing, is that it depends.
It depends on what you mean by truth. Whatever that might be, truth doesn't always translate well to fiction. The random shit that we encounter every day, that we just accept as another example of the randomness of this crazy world, won't always sit well in a work of fiction, where the notion of "natural order" can be most unnatural.
There was a few comments back in the old site about dialogue in fiction, making the point that writing dialogue as people might actually speak it can both be wearisome to read and come across as unnatural and unconvincing in written form.
What fiction can aim for is what could be called thematic truth, which may or may not correlate to reality. In any case, ten people could experience the exact same event and conclude with ten (and often more) versions of what the truth might be.