Fr Garrigou-Lagrange explains why the Blessed Virgin's universal mediation is theologically certain (sent. certa), and not merely a pious and probable opinion on account of its organic connection with established theological principles. The Mother of the Saviour, Ch. 3, a. 3.
The writer says in the first paragraph "Does it not follow" which means he is speculating. Then he finishes by saying the Pope knows the "Divine Will". This is way out of touch.