That proves that the witlesses don't abide by true scriptural teachings. However, it doesn't prove that you can even trust the LIE-ble for anything.
For those attacking the witless religion, however, you only need to expose one of those links as faulty to prove it's wrong. For it to be the truth, both of (1) they abide by their holy book, and (2) their holy book is itself sound) need to be true. If they claim to abide by their holy book and they don't, that's enough to debunk the religion as false.