Project planning with complete activity sequencing is about having a dashboard for early warning of risks and problems that provides the PM the ability to execute proactive management corrective action. There is value to project planning and an important part of the project management plan.
This is not an easy task if your team does not see value to it and if they see it as a means to reveal weakness. One of the duties of project managers is to educate every project team they work with on the value of the project plan. You will face questions or you will be challenged when sometimes you report the status of the project based on this and the team will say you are wrong. I always say that my report from the project plan comes from their progress report input. The data the team provides give the picture of where the project is and you will be able to accurately say where the project stands minus the guessing.