Tangential, but how many of us need a dedicated work time period at all?

I have a 15 minute standup every day, an hour long 1 on 1 once every two weeks, and the occasional meeting where I am genuinely needed and maybe 3 hours talking to another developer.

I would love to convert my job into a purely objectives driven thing with the only requirement being that I am online/in the office for those specific 5 or so hours a week.

I will take the risk that what I think takes a week of work runs over (forcing me to work on weekends) in exchange for that kind of flexibility.