exposing a CEO directly to your users is a great idea for all the reasons given, but it can be distracting if they seize on a randomly chosen user's idea as the Next Big Thing which Must Be Implemented Now because it resonates for some reason.
users' ideas and suggestions are great in aggregate, but any given one can be totally the wrong thing to adopt just because the CEO searchlight happens to pause on it and it's given disproportionate attention.