What?
You can get healthcare, your own job, your education, and leisure delivered to your door?
Think about going to see a doctor, going to the dentist, going to work, sending kids to school or university, and things like parks, museums, public pools, etc. The 15 minute city says in a perfectly designed city you could reach all of these within 15 minutes by walking, riding a bike, or taking public transit.
In my current city Id need to drive for ~20+ minutes to reach my groceries, and even more to reach any medical services or education facilities. And there is no public transit here. If you dont have a car you are screwed.
But you are simultaneously saying there is little work except remote work and also that delivery jobs are somehow preventing us from leaving our homes, which are not remote jobs at all.
You asked what the 'time city' concept was. You have your answer. You do not seem to understand the goal of it though