The Construction process is very complex. It involves so many people, Contractors, Inspectors, Architects, Engineers, Owners, Other stake holders, Subcontractors, Unions, Local Community and others. The Construction Manager is the focal point of communication among all these groups and is responsible to navigate the project to success through this maze.
Managing construction projects is 20% construction and 80% people skills. If you establish good relationships, most of the problems will be resolved. I’ve seen litigations where the underlying factor was personality clashes. When that happens the contract documents can become weapons for parties to use against each other and the project suffers.