A dogmatic SV is like the protestants who think that the reading of scripture is morally necessary for salvation. Only in the case of the DSV, he replaces the alleged moral necessity of reading scripture with the moral necessity of declaring men to be heretics and outside of the Church. This attitude presupposes one must sift through many, many documents in addition to simply adhering to the faith. This requires one to be intellectually apt to determine heresy, this involves the capacity to find out if the alleged error is contrary to defined dogma, and the quasi-juridical authority to render a judgment. Unless the DSV just wants other Catholics to take their word for it. This of course would make them (whoever they are) an elite class of true Catholics dispensing authoritative judgments that all should accept without question.
Another problem with DSV is that their entire thesis presupposes the necessity of modern technology, much like the protestant notion of the moral necessity of reading scripture (whatever that means) presupposes the technology behind such an endeavor. Thus, in adding to the content of the faith, they posit the absurd reliance on technology in order to render their judgment and thus become true catholics. But the merciful ones will apply the moral doctrine of invincible ignorance to those unfortunates who don't have access to the internet (the eighth sacrament and the medium of divine wisdom). But wrapped up in this benign condescension is to be found an implicit declaration that such a "truth" is morally necessary for salvation, otherwise no appeal would be made to such a moral doctrine in the first place. The very notion of "invincible" is in direct reference ot the concept of "punishment."
Moreover, just like the Muslim who pretends that their religion is pure and simple, but upon closer examination, one can see that it is filled with thousands of deviations, complexities, opinions and ideas, so too with the DSV with their pretended simplicity a complex array of contradictory opinions that taken to their logical and dogmatic conclusion would cast out every man who didn't adhere to one's own eccentric opinion.