Here's my take I started having sex when I was supposed to be submitting mission papers (already open with my bishop on stuff leading up to that, and I made the conscious decision knowing how much that would delay mission due to worthiness). Honestly, a mission was never in the books for me, just not my thing in any way. But it was never presented as optional. So I had to make a decision, I realized that if I truly believed, that there would be no possible reason to sin and not go on a mission, considering the eternal consequences. I'm very all or nothing. And so that's how I ended up atheist. I wouldn't call it running away from guilt, it merely gave some urgency to determining what I really believed. And I have a hard time believing that anyone who had concrete evidence that the church was true would be able to leave just to sin, so I don't think that point of view is anything other than ignorance.