This type of owner cares, but they think they know more about the particular service or trade that their building requires, then a true professional does? They have acquired the name "Mr. Knowitall"
They think they know everything, and everyone else knows nothing? These people are a bit of a nightmare for a tradesman or a professional, because they like to tell you what they think should be done when it comes to your job? It's completely crazy, but yes these people exist. They are wrong 98% of the time, and they can cause all sorts of problems for a professional to do his or her job properly, efficiently, and most of all effectively.
In our roofing company we explain to these sorts of people who the professional is and why that is. If they don't understand our mandate then we simply tell them, and if they continue to take over the conversation with one of our contractors, then we will not work for these people.