The control center toggles specifically tell you what’s happening (“disconnecting from X until tomorrow”).
If that isn’t what you want to happen, you go to the Settings app and turn off those toggles. (But I wish they would have a matching statement on screen that clarifies their changes are permanent until you change them again.)
Temporary toggles being in the control center is great. Most of the time that I quickly disconnect from WiFi or Bluetooth, it’s to solve some immediate, temporary issue.
The settings aren’t “changing themselves” — they’re doing what you asked them to do. The written message tells you what you asked them to do in order to teach new users what these buttons do.
