BFresh - couldn’t have said it any better than iab does above. If the client is a small independent and is paying their invoices and the project is moving forward (albeit sometimes sideways), there’s no harm in the client having some say in the creative process, after all the fruits of the labor, whether his or yours, will be his property. We have clients who want to be involved and unless they make dangerous or very bad decisions, I’m all for their involvement - it could very well be that he likes to be part of the process.
(and if, like iab mentions, it means more billable hours for you, I cannot see the downside unless it’s a corporate client, in which case you’d want to emphasize a streamlined approach that saves them money).