Nothing specifically wrong with it.
It usually represents a nasty turn towards elitist conservatism common among newly rich social climbers. Evangelical converts are more likely to be zealous authoritarians than cultural Catholics.
I actually find the inverse to be truer. When I think of "nasty elitist conservative zealous authoritarian social climbers," Catholic converts are the first thing that spring to mind.
Yeah, "ambitious conservative writer converts to Catholicism" is a bit of a meme on the right at this point. I
Indeed there is much lamenting in segments of the religious right that Evangelicals are basically foot soldiers for a movement whose intelligentsia is mostly Catholic.