Idk. Some people here have some good points involving the connection to community etc, but for me the reason I reject the possibility of souls etc. is because it's pretty clear we have little understanding of the nature of the very real and tangible relationships and systems that we live and operate in, some of which are very difficult to really conceptualize and see. Attempting to write what is essentially fan-fiction about spiritual matters is ultimately a waste of time, and I generally won't entertain that conversation with people who are being confrontational and adversarial, so I prefer to shut it down entirely and call myself an atheist.

That being said, there are lots of things that are a waste of time, that if people want to just shoot the shit about, I will always talk about, ghosts, urban legends, souls, etc. However, that doesn't mean I won't ask questions and challenge the foundations of those beliefs in a more agnostic fashion.

I'm not going to pretend my beliefs are scientific, but they may as well be logically sound.