It might help if you put your above quote in context…
Protestant Carl Trueman review and criticism of the book “Is the Reformation Over?: An Evangelical Assessment of Contemporary Roman Catholicism”
Here is what he says in his review above the above book (the entire paragraph you took your quote from though not the entire article"…
When I finished reading the book, I have to confess that I agreed with the authors, in that it does indeed seem that the Reformation is over for large tracts of evangelicalism; yet the authors themselves do not draw the obvious conclusion from their own arguments. Every year I tell my Reformation history class that Roman Catholicism is, at least in the West, the default position. Rome has a better claim to historical continuity and institutional unity than any Protestant denomination, let alone the strange hybrid that is evangelicalism; in the light of these facts, therefore, we need good, solid reasons for not being Catholic; not being a Catholic should, in others words, be a positive act of will and commitment, something we need to get out of bed determined to do each and every day. It would seem, however, that if Noll and Nystrom are correct, many who call themselves evangelical really lack any good reason for such an act of will; and the obvious conclusion, therefore, should be that they do the decent thing and rejoin the Roman Catholic Church. I cannot go down that path myself, primarily because of my view of justification by faith and because of my ecclesiology; but those who reject the former and lack the latter have no real basis upon which to perpetuate what is, in effect, an act of schism on their part. For such, the Reformation is over; for me, the fat lady has yet to sing; in fact, I am not sure at this time that she has even left her dressing room.
