The heart of Podhoretz's argument rests upon eliding the distinction between a necessary and a sufficient condition:
True, she seems to know very little about international affairs, but expertise in this area is no guarantee of wise leadership. After all, her rival for the vice presidency, who in some sense knows a great deal, was wrong on almost every major issue that arose in the 30 years he spent in the Senate.
Likewise, why not Ted Kaczynski for president? True, Kaczynski is mentally ill and incarcerated, but being sane and non-incarcerated is no guarantee of wise leadership. George W. Bush is sane and has never spent a day in prison, and look where he got us!