You also pay way less. DoorDash and all the others don't just charge the fees and the tips and what not, they also inflate the food cost by a pretty hefty amount. A simple example:

McDonalds has a 2 for $2 deal on sausage mcmuffins & hashbrowns - been around forever. Let's say you and the wife want a McMuffin & a hashbrown each - you're in for $4 dollars and a bit of change for tax.

Here is the same meal via DoorDash:

McMuffins: $2.87ea Hash browns: $1.91ea

Subtotal: $9.56 (just below the 10 dollar minimum to wave the fee if you have DD+)

Delivery fee: $1.99 Service fee: $3.00 Tax: $0.91 Dasher Tip: $5 (good luck getting your order on time if you tip less than this)

Grand Total: $20.46 for $4 of food.

You can "optimize" by ordering an additional hash brown to get over the $10 hump so you can wave the delivery fee and reduce the service fee - which will instead cost you a total of $17.91 for $5 worth of food. Either way it's a shit deal. Not included here are the costs associated with 1 in every 4-5 orders being incorrect, or delivered to the wrong house and the hassle that adds to your life.

Obviously I went with low cost items to illustrate a point but often any food prices you see on DD are a good 50% markup vs going in person regardless of the restaurant before you even get into fees and tips.