In my large dense city, most of these guys do it on ebikes. I don't see how it's cost effective timewise to do it in rural areas with the travel time and gas expense. In an extreme example sometimes people will order a value meal for 1 or 5 large pizzas for a party. Delivery person still has to go from restaurant to car and car to your door which can sometimes be a hassle (big yard or complicated labyrinthine apartment complex).

I also just wish tipping would not exist but I'm also not going to screw someone over. Frankly, lately I've been trying to just make food at home and pick-up myself more often.

To put things in perspective, how much hassle would it be for you to get ready and go to the food place? How much time will it take you round trip? How much would you spend on gas or transportation cost if you don't have your own vehicle? If the delivery fee + tip is really not worth it, one can pick it up themselves.

You know for a fact if someone wanted to try and start to implement flat rate tipping, the rate would be based on the most expensive possibility.