Perhaps loads of people don’t leave the LDS Church because if they do, their very lives will crumble.
As in, like the World Trade Center did.
Lost employment. Family shunning. Severe depression, even suicidal thoughts.
Lost employment, 1) through coworkers in Mormon culture acting out of offense or 2) disbelief, leaving the employee to not even be able to function since loss of belief in the church is as significant as the loss of family.
Family shunning, because 1) after all, anything it takes to convince the person to return to the fold because, after all, families are forever. Then 2) there’s the temple recommend question: “Do you support, affiliate with, or agree with any… individual whose teachings or practices are contrary to or oppose those accepted by the Church of Jesus Christ of Latter-day Saints?”
Severe depression, when the church amounts 1) to your entire worldview and 2) comprises all of your identity and even come suicidal thoughts, those things shattered.
Better to fake it, Mormons might say, than lose everything.