The least generous, and therefore most likely in this timeline, interpretation I’ve heard is they intend to create immunity for ‘official acts’. And then send back to the lower court a test to determine which of his insurrection fomenting ‘acts’ were ‘official’.
At worst postponing any trials til after the elections.
Tax advantages. Visitation rights. Inheritance. Immigration. There are reasons.
A big ceremony isn’t one of them.