I'm not sure most deliveries really reduce the recipients mileage.
The alternative to Uber eats coming round with dinner 5 times a week is that you bought enough food to cook your own dinner when you went shopping on Monday.
I agree with the fact that it's better to cook at home than order in 5 times a week. However there are many people who just don't cook, and I think that 5 Uber deliveries a week is better than 5 trips to get takeout (assuming the Uber delivery is done on motorcycle or bicycle compared to trips in the car).
Seems like it might depend. I might be able to pick up dinner on my way home but delivery might need a whole round trip. In some cases delivery might be able to make a few deliveries in one trip but I'm not sure if that's done in general for things like Uber eats.
The alternative to Uber eats coming round with dinner 5 times a week is that you bought enough food to cook your own dinner when you went shopping on Monday.