I have no idea why anyone would purchase a coffee when you can just go and make one for your self.
Maybe because of the different brand? If you don't like what they are serving, you have another option at least. They get a cut from the business, so why not?
Yes but if you have paid for the lounge which offers all food and drink why pay for coffee over and above the price you paid. I get that you may want a different brand, but then rather have something else instead.
It is for fussy people 🤣