I have never heard of or expected this from my "binary choice components".
It's fairly standard in 'traditional' desktop UI where actions are supposed to be initiated by regular buttons and things like radio buttons and checkboxes are for setting the options of the action. "Radio buttons never initiate an action" says the classic MacOS HIG, for instance.
Right, but on macOS, checkboxes often apply immediately. Just look through System Preferences, which largely doesn't even have a "save" action: checkboxes have take effect instantaneously. (So do many radio buttons…)
Yep, that's why I said 'traditional', this has drifted a fair bit because there's a benefit to providing immediate feedback, especially if the action is some visual and reversible change like turning on dark mode. Windows ribbons are also full of such radio buttons and checkboxes.
It's fairly standard in 'traditional' desktop UI where actions are supposed to be initiated by regular buttons and things like radio buttons and checkboxes are for setting the options of the action. "Radio buttons never initiate an action" says the classic MacOS HIG, for instance.