Yeah, human intelligence/knowledge is way too limited to make any certain claims about this kind of shit. We can get first hand statements from people who have started to die, usually seeing a white light etc, but that's about it as we don't have necromancy.

You can reasonably dismiss claims without evidence, burden of proof and all that. But I don't call myself an atheist because you can't disprove every single god that has ever been thought up, let alone the ones that haven't been thought up yet. Although most religions do attempt that, whilst excluding the one they personally agree with the most lol. Atheists just go one step/religion further and are slightly more consistent with it, but are still guilty of the exact same conceit.