"How many people do you see buying their coffee?"
Plenty. Look at their annual report. Why be so concerned with what type of coffee drinks others buy? That doesn't influence what you buy, does it? I've purchased Starbucks beans since 1991 and haven't found better. Your comments would suggest you have issues more with who buys what at Starbucks rather than the quality of the coffee. If you think it's awful, nobody is forcing you to buy it. Stick with what you like and don't worry about what others like.
Really? Look harder.
I'll try just once more to clarify what I've been trying to explain to you: Starbucks sells a lot of drinks with huge margins and makes a lot of money doing it. Good for them. But their coffee, their regular black coffee/espresso, sucks. That's because they use cheap beans (margins, anyone?) and overroast them to mask the flavor, then encourage people to buy expensive variations with lots of sugar, milk and flavorings (again, margins) to further mask the poor quality of the basic coffee.
They make great money but would be gone in a week if it had to sell coffee. Just coffee.