Its because adobe wants it running all the time. They straight up don't care about the customers. They care about making money regardless of the methods. What's the cost to their reputation for using spyware that runs 24/7 on customers computers? Compare that to the benefit. Clearly the result was: benefit > cost
Even if Creative Cloud updates and syncing are paused, this continues to take all the bandwidth. You have to exit CC completely to make it stop if you need to run a meeting instead of syncing your cloud changes that don't matter in that moment.
Adobe clearly doesn't understand that not everyone's internet service is high speed, and they don't consider this feedback to be relevenant to product development.