I think this may have to do COVID and then staffing shortages creating a necessity rather than a active business decision.There's a Starbucks near me that was built as drive-through only. Where there should be a lobby, it's just blacked-out glass and a door for the employees to enter through. Makes the whole strip mall look really scary, especially since vagrants sleep in the doorway.
I assume it's for commuters, which means all Starbucks contributes to the neighborhood is traffic and crime. Thanks, Starbucks!
It would be ridiculous but couldn't you walk through the drive through?
I used to do this all the time when I was a kid, but more and more places won't serve walk-ups at drive throughs. They claim it's for safety, hygiene, insurance, or whatever the excuse-du-jour is. They just close the window and ignore you.