That's kind of my point, you said it was a solved problem. This is obviously not about just making coffee, you were misrepresenting the problem being solved. Convenience is a thing. If this coffee could be made and delivered on the spot exactly when you want it then this service wouldn't exist.
I meant that the other way around from how you wrote it. As in: you probably can make coffee well within the time that it would take some service to make it and deliver it for you, and likely your locally brewn coffee would be hotter.