It's a bit of a No True Scotsman, but a lot of people who claim they're devout don't really read the Bible at all, just make public judgments about people. The actually devout people I know usually have a copy of the Bible near the bed, often with an issue of https://en.wikipedia.org/wiki/Our_Daily_Bread on top of it (A daily devotional.)
Very long-time atheist here.
Is it really that much of an ordeal to spend 10-20 minutes with the words of the creator and lord of your universe every day? IMO if that sounds tough, then the belief can't be serious. If you have a favorite 1 hour weekly TV show, that's almost the same amount of time committed.