That's because you are a solipsist who believes he can unilaterally declare the church empty. But then if the Church is empty, what good does it do you or Fr. Cekada to quote a non-Catholic from a letter of unproven existence?
I don't think the Vatican is saying the thuc consecrations are certainly invalid, but just that they're doubtful. But I could be wrong.
With regards Ladislaus' comment, I have a hard time believing that fringe bishops who may or may not actually be straight in the head, and have no oversight, are what the Church has in mind when she says we presume the validity of ordinations. And I find it strange that such would be presumed in a case like Thuc, but not for Novus Ordo ordinations.