You don't have to cook now, a lot of people don't. It's pretty easy to see that even though options like restaurants, fast food, food delivery, etc. exist doesn't mean that everyone will use them all the time and people still enjoy cooking food themselves even though they know they could go to a fancy restaurant and have the same dish prepared by a professional that has a lifetime more experience than they do. Full AI and robotic automation would be the same, if you want to code something yourself you'll do it just for fun even though you don't have to and what you produce might be objectively worse.