Well yes, I think the usual intuition is that the people who preach something (religiously or not) should be better at what they are preaching than the ones they are preaching to. Right or wrong, I think that's a pretty common presumption to make.
Might be small sample, but that sample is also biased to have a lot of knowledge about what they are preaching (supposedly), meaning they put higher importance about it compared to other things.
Might be small sample, but that sample is also biased to have a lot of knowledge about what they are preaching (supposedly), meaning they put higher importance about it compared to other things.