Sometimes, you have to accept that vulnerability. I have exactly one option for getting electrical service, for example. But in general, people should avoid this sort of arrangement to the greatest degree possible.
Especially for something where there are tons of other options, like home automation.
I use Amazon Echo to turn on/off my lights. If my home automation doesn't work, I can still just use the light switch to turn them off and then they will come on.
Or if there is an Amazon issue, I can use the app of the bulb manufacturer instead. It's a convenience feature and if it doesn't work, it's a minor inconvenience.
Many of us would be much more screwed if something happened to our Google or Apple account... and that same story of erroneous bans have happened to many people.
“'I never thought leopards would eat MY face,' sobs woman who voted for the Leopards Eating People's Faces Party.”
— <https://twitter.com/cavalorn/status/654934442549620736?lang=...>