There well might be. And when someone puts a compelling case forward for adding them we do certainly consider it. 
Unfortunately in this case there does not seem to be a solid reason to add this as a user preference, and it makes more sense to leave it in the hands of the admin. Even if left as the default they serve a useful purpose, and even more so if the messages have been adapted to a particular site who may have changed what each TL can do.
I feel we are also drifting off-topic in some of the latest points you’ve raised and it feels like this subject has come to a natural close.
I shall mark this topic for closing.