I prefer to chew my own food as do most adults.
You can’t claim it’s objectively better user experience, we haven’t really tried other alternatives. You made that up. It comes from a place of contempt for the mythical ’user’ that is unwarranted and distasteful. People are not as stupid as you think they are.
There a many work flows that would protect privacy and require no additional steps or unfamiliar actions most consumers of robo vacs already know.
Users have to clean and handle a robo vac frequently. Make an app that guides them in the clean out and does the firmware update by bluetooth (which is only on when the dirt trap is open) AFTER asking permission and explaining the update.
Once more, there is no compelling use case for constant internet connection for these types of appliances. The only reason to include it is to invade privacy for Silicon Valley reasons, which are evil.