How to trigger a switch that is already turned ON?

Alexa, I’m using the “Home Assistant Cloud” with a paid subscription.

If you’re interested you can reduce the automation to this:

alias: Kettle
description: ""
trigger:
  - platform: event
    event_type: call_service
    event_data:
      domain: input_boolean
      service_data:
        entity_id: input_boolean.kettle
condition: []
action:
  - delay: '00:00:0.5'
  - service: "shell_command.kettle_{{ states('input_boolean.kettle') }}"
mode: single

It’s triggered by either an input_boolean.turn_on or input_boolean.turn_off service call event and then executes the appropriate shell_command (kettle_on or kettle _off) based on current state of input_boolean.kettle.