Not only that, but it makes the atheist position basically no threat to theism at all. Theists argue that there is a God, that God actually exists. If atheists are simply people that lack this belief, then their position suddenly becomes of no consequence to the theist. Okay, you lack that belief, so what? There's nothing to argue with there. They haven't really taken a position, they've just told us what their mental state happens to be.
So, if this is what atheism actually is, then more power to them. Atheists just lack belief in God. Great. Apparently they lack the testicular fortitude to make up their mind about whether He actually does exist as well.