The problem with this kind of argumentation is that the second you admit that the good proves the value, you also have to admit the opposite—namely that the bad disproves the value. This is the principle we follow when we judge literary works. The good proves the value; the bad disproves the value. If Mein Kampf is found to contain more bad than good, its value is disproven.
Similarly, as soon as you admit that the good passages of the Bible prove it is divinely inspired, you also have to acknowledge the opposite. You have to acknowledge that the bad passages of the Bible disprove the assumption that it's divinely inspired. Then, you have to see how much good vs. bad there is in the Bible while also remembering that extraordinary claims require extraordinary evidence, and hence, if the Bible is divinely inspired, there should be an infinitesimal amount of bad found therein. However, we know for a fact that this isn't the case.