You are exactly right. However, in the legal realm, especially at this level, a person has to be able to express their thoughts precisely and accurately in writing.
I'm more worried about her being another o'conner on the court than her writing.
If she was a conservative that couldn't write at least she could get her clerks to do that for her.
I'd rather have a conservative that couldn't write and be another vote for scalia majority opinion than a moderate that could write.
But with O'Conner she is not a conservative and can't write either.
-However, in the legal realm, especially at this level, a person has to be able to express their thoughts precisely and accurately in writing.-
And she has done so, many times.
That, my friend, is the job of the law clerks. I suspect that, other than Scalia's, 90% of the Supreme Court opinions were written by the justices' law clerks. In that sense hiring skills are much more imperative than writing skills.
I don't usually do this -- but if you're going to snark at someone for lack of precision in writing, you should at least learn the rules of grammar first.