The question then is: Why do so many stay when they obviously don't or can't bring themselves to agree with their church? I don't know (I left, after all), but it'd be interesting to find out what their reasoning is for preferring their own opinions those of their priests and bishops. The article doesn't really explain that, only mentions something about a sense of ownership of the church even if they disagree with most of its doctrine. I suspect if they were to dig a little deeper into the thinking of the respondents, the researchers would find that many who they interviewed were not really Catholic at all in terms of the much-prioritized "formation of conscience" (as they called it when I went through RCIA). Something is failing in the process of religious formation, alright.
I don't understand why religion, particularly in the USA, is looked at in this way. If you bought some consumer item (which I'm afraid is probably the best analogue to the way that many see their religion) and found it disappointing, you likely wouldn't jealously guard it. "It's MY thing! MY thing I dislike!" It makes no sense, I tell ya!