Indeed. The thing that turns people off to agnosticism, I think, is that it requires a high tolerance for uncertainty. (Not that this is a bad thing to cultivate, in the least.) Saying 'I don't know' feels too disempowering to many people, whatever the issue may be.
I personally consider a high tolerance for uncertainty to be one of the most precious and useful traits a human being can cultivate in this life. In fact, I think that not working to cultivate such a tolerance is a poor allocation of time in this world. Uncertainty is the only guarantee, after all.
I feel almost angry at times that many religions refuse to admit the reality of constant change and uncertainty. It seems like they are just lying to make people feel more comfortable, aka kind of a repugnant thing to do to.
Then again, it is probably very easy for me to say that because I have an almost insatiable desire for uncertainty-- not knowing the true nature of the cosmos does not bother me. In fact, I find the mystery to be exciting and it makes me feel alive.
Personally, I find it hard to understand the need to cling to something perceived as being eternal. Even if I knew for a fact that God was real, I would still prefer to float around here without his help or assistance. Kinda like "thanks for the offer, man-- but I'm good. I'll hit you up if some catastrophic shit goes down."
And eternal life? Please no, let me die and merge back into my earth! :D But seriously, the idea of eternal life is absolutely TERRIFYING to me-- how scared and/or egotistical do you have to be to actually crave that? At the end of the day, man is just a man-- is it even psychologically healthy to yearn for 'eternal life'? I'm not quite sure it is. It seems healthier to just work hard at accepting the uncertainty inherent to being an organism.
Anyways, just my opinion-- I mean no offense to anyone, christian or otherwise.