It’s not, and in a vacuum I don’t think anyone would mind. It is the fact that it is concealed that is really shitty.

“It reserves bandwidth for high-priority tasks such as Windows Update over other tasks that compete for internet bandwidth, like streaming a movie”

As much as I’d like to keep my system up to date (and I really do), if I’m watching a movie then that is my priority. Any task I’m currently using the bandwidth on, should be considered my system’s priority. This is akin to rebooting the computer when it determines it is necessary, with the user having little control to stop it; it’s intend isn’t malicious, and it is meant to protect the user, but all it achieves is upsetting the user and make us find ways around it or turn it off completely.