LOL at the Doritos order!
Yep, Alexa has a mind of her own.
Some voice commands with Alexa and Siri work fairly well, others not so much, especially with Alexa. I get tired of arguing with her when I ask to have a specific light turn on/off, dimmed, color change, etc. and she claims there is no such device. Repeating the command several times finally gets her to carry it out. She is often like dealing with a teenage daughter with lots of attitude.
With Alexa, the app does a good job with routines that are programmed to occur at specific times. But using the app to turn on a specific light or plug takes several steps. So either argue with her via voice, fish through a poorly organized and designed app, or just go directly to the app for that light and turn it on much faster. Apple has very little as far as HomeKit accessories, but at least the Home app is far better than the Alexa app. Siri is less likely to argue, but she probably is dumber than Alexa though! So with HomeKit accessories I also usually use the Home app or the accessory’s app rather than voice.
I shudder to think how horribly wrong voice commands will go over in driverless automobiles.