Yeah it’s this, Starbucks isn’t a coffee place; it’s a caffeinated drink place. Their brewed coffee (outside of their higher end tasting room stores) is deliberately undrinkable to push you to their espresso drinks or their sugary concoctions.

Its a flavored milk business that also sells coffee

That’s spot on! I really like the chocolate milk at Starbucks. And sometimes I will get one with the optional shot of coffee added.