I guess you've never use Alexa Routines then? Every night I simply say "Alexa, good night" and she executes an Alexa Routine which turns off lights, turns off the TV, etc... We also use another Alexa Routine for "Good Morning." Alexa Routines are very nice and allow for much more natural speech.
Yea, there's a reason you hear "Alexa, ...." and "Hey Google, ..." on TV... It's called popularity. I have many iOS devices, but I rarely use Siri for anything. Siri was fun when she first was released, but I find Amazon's Alexa to be much more useful for home automation. Also, the Amazon and Google devices are much more affordable than an Apple HomePod.
Choices are good! I like that there is some healthy competition in this technology space.