we should have an all-controlling central state with specialist optimal-career-distributors and specialist psychologist day-planners who hand out schedules and to-do lists to every citizen every day which must be followed to the letter on pain of death and in which the citizens have zero say. Nobody would have property, you would just contribute towards the state of human happiness when the state told you to and then you would be assigned the goods you needed by the state. To me, this seems like a happy wonderful place that I would very much like to live in

Why do you call inhabitants of such a state "citizens"? They are slaves.

To me, this seems like a happy wonderful place that I would very much like to live in

Interesting. So you would like to be a slave.

Unfortunately, everyone else seems to strongly disagree.

...and do you understand why?