If the change is extremely trivial then so is reviewing that change. Not much time is lost
I have never found this policy to significantly hamper my overall productivity both as an author or as a reviewer.
That's the problem with review of trivial typo fixes. Obviously no org should have those reviews as somehow so mandatory that each individual developer can't override the policy such as by self-reviewing the change.
If I was in an org where a policy required me to bug the dev next to me in order to approve a typo fix, I'd quite frankly quit.