People don't open coffee shops to drink coffee all day any more than someone would open a bar because they want to drink all day.
My brother is a wine maker. He is insanely passionate about wine (Pinot to be precise). When he's not working he's talking about and sharing wine. But at the end of the day, he's just a farmer. He tends his vines, picks the fruit, puts in vats, waits a while and then pours it out into bottles. It's horrible, torturous, back-breaking labour for him. But he does it because he wants to put the best damned Pinot on your table.
That's why you open a coffee shop.
That's why game developers build games.
Anyone passionate about wine knows what it means to make wine, and anyone passionate about coffee knows what it takes to make coffee. The coffeeshop fallacy assumes our coffee drinker knows no shit-all about coffee.