I think that's an apples to oranges comparison though. Clock management is part of the game in basketball and American football - teams are given timeouts and use tactics to stop the clock so they can setup a new play. In soccer, this doesn't exist and with an official clock that everyone could see and that the ref starts and stops (like they assumingely do today) the game would play like it does today. Just that the clock stops and restarts would be visible to everyone.
For instance, the ref wouldn't have to stop the clock for basic throw-ins, setting up corners, etc as that's part of the game. So long as it's done in a timely manner. But for flops/injuries, setting up bookings, substitutions, etc they could stop the clock and restart it when action resumes as they do privately today.
It just feels like having a single person secretly control the clock and make what appears to be arbitrary calls as to how much time is added and when play is officially over is odd.
I guess my point is the game could be played exactaly as it is today but there would be transparency on the game clock. The game isn't that tied to tradition using VAR after all.