That's your opinion. Would you care to elaborate on why you think she doesn't have the leadership or intellect? As far as gravitas, who had any since Eisenhower or MacArthur, and why did they have it?
I heard that the DemoncRATS were doing their”dummifaction” thing back then, and were saying that Ike was to dumb to be President. Ike, the Supreme Commander of the Allied Forces, and the main architect of D-Day, was considered too dumb by the Dims!
It all stems from her demeanor. She is, by her own admission, a 'hockey-mom'. Do you seriously think a hockey-mom is going to lead this country out of the wilderness? I think Huckabee would have had a similar problem -- too folksy and lacking a certain level of reverance/seriousness.
And plenty of people have had gravitas: Nixon, Reagan, Cheney, Bush I, etc.