An ordinary operating control is not a substitute for safe electrical isolation before the maintenance that requires it. Follow the isolation instructions for your appliance and never put your hand inside the disposer.
What the observation tells you
An air button, stopper control or wall control can have a different role from the supply isolator. Silence only tells you the motor is not currently running; another person may operate the control or power may return unexpectedly.
A useful next step
Identify the proper isolation method before starting an approved owner task. If it is inaccessible or unclear, stop and ask for assistance rather than relying on the button alone.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.