They do. Just good business sense. Why your order might be cold or incomplete. Well, one reason.

Hopefully the drivers are fairly compensated. (They aren’t, hence the driver tip.)

Delivery of food from arbitrary restaurants so you do not to leave the house, by companies underpaying drivers while raising prices silently, adding service fees, and trying to push the burden of compensating the driver on you via tips.

First world problems require first world solutions.