it's the do as i say not do as i do hypocritical attitude that makes them lose their "expert" status
Why? Look at Birx. One inconsequential mistake and the field she dedicated her life to is just washed down the drain? Her expert advice is no longer considered expert advice because she traveled to close her summer home?
Take anyone you consider an expert in their field. Now if they do something that they preach don't do, they then are no longer an expert? Doesn't seem right.