That all may be true, and be even more worrying.
Nobody said the committer was not intelligent nor prolific. What was implicitly brought into question was the judgement of the person.
"But all the people who reviewed and accepte the commit!..." Sometimes reviewers don't pay full attention (because they are busy). Or sometimes they don't feel confident to challenge someone. Or they may be inexperienced.
Second, do you have any idea if the issue being solved here and what a less clumsy fix would look like. Nobody is denying that it's clumsy, which is why it is being reverted, but have you evaluated the alternatives or even bothered to look up mailing list discussions before making your conclusions about it?