That is the claim. However, just because a lot of people believe it doesn't mean that 'spirituality' is anything more than biochemical reactions in an analog organic neural net.
It is an emotional thing with you, but you can not show that 'spirituality' exists outside of the function of the brain, and in specific the human brain at that (although there might be indications in elephants, and some of the other primates).
If you want me to take that claim seriously, give me direct evidence that 'spirituality' is more than an effect of brain function.
You can pull QM quotes out of the air all you want, but QM does not
show any relationship to the gospel of John. You might have quoted the religious opinion of one scientist.. but that does not make it any more than his personal opinion.