If you need a robot vacuum because using a regular one isn't a realistic option for you, whether it should require internet access is irrelevant. It does, and making fun of people whose fault it isn't is mean.
It really isn't irrelevant, it should be top on their list of things to know about. As we're seeing here, it's a source of unreliability and if you want a robust home automation setup you should look for tools that don't require internet connectivity.
That's the only thing which comes to my mind when I read the headline.