I went to the website in the first post, and backtracked to the home site.
Webster is an ex-Catholic. The site links to such anti-Catholics as James White. Webster backs up his anti-Catholicism by citing various works by other ex-Catholics.
He is biased; everything seems to be from the point of view that it is fine to disagree with the Magisterium regarding a point of dogma. I.e., if you think the Pope who defined the Assumption of Mary as dogma was wrong, then you are right, and the entire Church, all her clergy and members, are wrong. (Note that he did not present any arguments in favor of the Assumption.)
So he basically says that, if you disagree with teaching, rather than trying to reconcile your ideas with the Church, you should quit.
I do agree with him on one thing. If you find you can’t accept the Church’s defined teaching, yes, you should quit!
Heart of Jesus, wherein are all the treasures of wisdom and knowledge, have mercy on us.
Ruthie