Religion and spirituality plays absolutely no part in my human experience and doesn't need to play any part in anyone else's either.

Hunger has played a key part in the human experience since the beginning but we'd like to eradicate hunger.

It's here now, and it's not going to disappear

You could say the same about capitalism with just as much evidence.

Even if people abandon religion as a belief, they will not be abandoning the spiritual traditions that they grew up with (see how many atheists still celebrate Christmas for instance)

Celebrating holidays does not necessarily have anything to do with religion or spirituality, regardless of where those holidays originated. I'm saying people should not be taken seriously when they state that they believe in the supernatural, and you retort by saying, "But it's not bad when people get drunk and throw a party on a specific calendar day! Curious! " It's a complete non-sequitur.