Batteries going out have never locked me out of my home.
Seems like you're putting way too much thought into something that probably won't happen, being 2022 with notifications and all. I don't justify my choices with 0.1% chances.
You seem to put trust in technology to do important tasks, when they have problems securing a stupid light bulbs.
There's a joke about it:
Tech Enthusiasts: Everything in my house is wired to the Internet of Things! I control it all from my smartphone! My smart-house is bluetooth enabled and I can give it voice commands via alexa! I love the future!
Programmers / Engineers: The most recent piece of technology I own is a printer from 2004 and I keep a loaded gun ready to shoot it if it ever makes an unexpected noise.
I don't have gun for that, but a baseball bat instead. That scene from Office Space made such an impression, and I swear one day, I will recreate it on a piece of gear that steps out of line.
Seems like you're putting way too much thought into something that probably won't happen, being 2022 with notifications and all. I don't justify my choices with 0.1% chances.