Nothing you just posted said Bush would appoint a "known" anybody to the Supreme Court. It said he would appoint justices in the mold of Thomas and Scalia. The only thing most people "know" about Miers is that they "know" very little about her. But while she isn't "known" to most Americans, she may very well be cut from the same ideological mold as Thomas and Scalia. And nobody on this site "knows" for sure that she is not.
Sell your snake oil to somebody gullible. I'm not buying it.
And you don't know that she is...and thats where the concern lies.
Scalia and Thomas were tested nominee's before they were confirmed. And they have lived up to hopes of millions of Americans. Miers is 60 years old and has no opinion about anything.