I think it's a personality thing. If we're going by Myers-Briggs, NFs in particular (especially the introverted ones) lean towards mysticism, and there's really not much of a place for us in modern secular society. Even our atheists tend towards non-naturalism and a pseudo-religious understanding of the world, but that's not an approach that's well represented these days.
I do not like the implication that anyone who does not fit in with the popular atheistic model of what a meaningful life should look like is in some way lacking, though. That's pretty dystopic and totalitarian. (I don't think you're quite saying that, but other people do.)
Well, I would disagree for the reason I pointed out to Keith. Lack of religion can be harmful to anyone of a mystical inclination, because secular society just doesn't have the resources to deal with that sort of need. You're better off within the refuge of a religious tradition than off in the wilds of Spirituality Without Religion where mental health issues lurk.
There are some manifestations of religion that are absolutely harmful, I would agree, but it's hard to see how something like Unitarian Universalism could cause anyone problems, unless perhaps you've got scrupulosity. (Even there, UU would be a weird one to set that off.)
I don't really care if people aren't religious, though. What bothers me is the idea that the world would be a better place if religion were wiped out, and everyone who doesn't think that way is an indoctrinated fundamentalist who simply doesn't see how beautiful a world without God really is. Which doesn't apply to you but certainly is the case for some others around here.