But there's actually a serious point to this. It's impossible to know for certain whether something is worth your time studying or not unless you study it in the first place. So you could, presumably, study everything and decide afterwards -- but that's horribly inefficient. The number of plausible things to check grows faster than anyone can keep up with.
So you have to reach an assessment sooner than that if you want to find the stuff that's actually relevant to whatever topic you are researching. Sometimes that ends up meaning that you miss something important but it's better than getting bogged down in trivia, having to spend ages trying to refute something that is obviously wrong, or whatever, and you miss the important stuff anyway because you never found time for it.
As far as I'm concerned, then:
(a) my studies of the Bible aren't complete in a literal sense, because I could always read it more deeply and thoroughly than I have done;
(b) but I've already spent enough time on it to be happy that the Bible provides nothing of substance if I want to understand physics, or the origin of the Universe, or the origin of mankind, or anything else that interests me at the moment. Such as, you know -- physics.
You are free to persuade me otherwise, of course, or at least to try to, but in the meantime I've created time for myself to spend more productively (well, in theory at least).