Food business is laborious, hard work that needs to be done at undesirable times (when others are out enjoying themselves). It’s hard enough to find quality workers via humans, I find it hilarious that one would be able to do it via software.
It’s also a high liability business, especially when dealing with animal products.
Not to mention prepared food is barely affordable for the vast majority even with the tiny margins that exist today, so the only people who would be able to afford such an on demand personalized chef service surely could just afford their own chef?