I see that I can create a custom routine that works on a schedule, but the user interface also requires that I enter a voice trigger. It is unclear to me if the voice trigger is required to actually activate the routine (either once or always?), or if it is merely a formality of the ui design to create the routine, and will ignore that, instead relying on the schedule I've entered to initiate the actions in the routine. E.g. "Set shoplight color temperature to 10000" with schedule set to daily at 7:20am. I can see no need for a voice trigger to be defined for this, and certainly no need to actually say a voice trigger to initiate these actions.