Why are people so infatuated with coffee makers in their room in Vegas?

I see so many reviews asking or complaining about them, to the point of people stopping at stores to buy one. Or even setting up meetings to give them to others arriving. We all read the stories about drunks urinating in them as a sad “joke”. Plus you are on vacation, why not head down and buy a fresh cup? Personally I find that thought of using something in or just outside the bathroom to drink out of disgusting. No different than the glasses in hotel rooms. What am I missing?