Even if every person prepared their own food and drinks 99% of the time we'd still have restaurants and coffee shops.

Just see how much you get paid an hour and divide that by minutes.

Then see how much the same food costs at a grocery store plus how long it took you to prep cook and wash dishes vs how much it cost to buy it at a restaurant and how long you had to wait for it

For me it was about making things simpler. We bought a dual level countertop oven that I use for like 90% of our meals. I season and put proteins in the bottom tray and then prep some veggies and toss them in the top tray, then 20 mins later we have a meal. If you use foil you basically only wash your plates and forks.

if you buy multiple meals worth of groceries at a time its just as quick to get home and make a meal as it would be to drive by a place and pick up food. If you make a big meal like a huge pot of spaghetti then even faster each subsequent day.