While true this would lead to thousands of people being online without demand. If one really wants their food in 45 minutes, or an uber driver always 3 minutes away, they need a lot of people doing nothing staring at their screens for long periods of time

Capping the # of people online would cause tons of other issues, its very easy to exploit a system like that, plus it would slow everyone down

Either we want people to do things for us, want it super fast, and want to pay everyone for every second of their time. Can't have all of these without hiring a personal driver working just for you full time