The As-Is Process Map will not tell you why the process behaves the way it does. It shows where time accumulates and where value is absent. The cause sits behind that, and finding it is the work of the Analyse phase.
It will not verify your data. If you enter a wait time that is wrong, the map will accept it, the validation will pass, and the export will carry the error outward. Validation checks notation, not truth. Nothing in the tool can tell you that a number came from a guess.
It will not design your future state. There is no automatic removal of non value adding steps and no generated to-be map. Redesign requires judgement about risk, control and capability that no diagram holds.
It will not quantify benefit. The tool records process time and wait time. It does not convert those into cost, savings or a business case. Those calculations depend on assumptions you must state and own.
Finally, it will not create agreement. A map can make disagreement visible and specific, which is valuable. Resolving it still takes a conversation between the people in the lanes. The sample case here, with its Customer, Front Office and Back Office lanes inside a pool named As-Is Process, is a teaching example. Your own map will be messier, and that mess is the point.