you're absolutely right. this is a stupid solution for a stupid problem. But you're also right that this is a product for a special subset of people that need this and whom this works for.
Both can be true.
That's the nice thing about capitalism (free market economics actually): You don't have a authority that decides what is useful and useless, what gets produced and what doesn't. Because in the End, everything is useless. I have a robotvac because I'm too lazy to vacuum myself. Stupid and Lazy. I have a Vacuum cleaner because I'm too lazy to use a Broom. Stupid and Lazy.
So yes, it's both. Stupid solution to a stupid problem. But it's also a great product that solves a problem that a subset of our population has and therefore useful.
How the fuck did that happen?
Dear south korean government
please hire me instead. I promise I'm so paranoid, this will never happen.