It's to prevent users from accidentally messing up their settings without even noticing.
There's only a very small amount of people who actual need/want that button at all.
Which is why it got removed in the first place.
So, the confirmation is a safeguard which will not be removed again.
I know its a safe guard, and know exactly why the button was removed in the first place as as soon as I updated obs a while back and released it had gone, I went straight to googling it and found out all about it. I for one am one of those very small number of people who actually want that button as I do have a need to change it when the moment it suitable. I fully understand about people accidentally changing it messing up their settings, not knowing it and perhaps not knowing how to change it back, but I
do know about it, and know how to use it, since almost straight after using obs for the first time, and was delighted when I finally realized what that button did, loved it ever since - so helpful.
Since its open source, thats why im here, asking this question to change it (disabling it) to better my needs.