Most do - even small towns do.

Starbucks is convenient and that's what they do.

Small stores don't usually have an app, have too few workers so it takes 5-15min to make the coffee or worse after whatever line.

If they ever figure out they can buy a whole ass bag of coffee and a dripper for the cost of 3-5 Starbucks and drink for a month... They'd still go to Starbucks.