One impact-damaged pipe or failed joint does not automatically establish system-wide deterioration.
Ask bidders to draw the boundary. Whole house, all accessible branches, hot side only, a single bathroom group, and meter-to-building are different scopes. Connections left in place can matter as much as the new pipe.
Keep this boundary: Pipe material alone does not prove failure or justify a whole-building replacement. Condition evidence and a specific scope are required.