I did see the other day Chipolte is doing their own delivery service now which is awesome. Not sure why more places ditch Grubhub and Doordash and just have their own in house delivery service. It's so much cheaper than outsourcing to companies who've been gouging restaurants and the consumer.
Basically contract delivery services have a premium to begin with, to take the delivery business off your hands. If you have dramatically more orders per day, it can actually make sense to have your own delivery people; especially since your managers have all the time in the world to focus on delivery now that your dine-in is closed or restricted.
I may be the only person in my apartment complex ordering Chipotle for dinner tonight, but there are going to be several others ordering something.
Now, unlikely and difficult don't mean impossible but there's more to it than meets the eye.