Why the Protestant Reformation worked

Perhaps one reason why the Reformers, the Protestants, of the seventeenth century and earlier were able to take the extraordinary step (it seems extraordinary to me) of excluding monasticism from Christianity - was that everyday life itself was then potentially almost-purely-monastic - so that relatively little was lost (although there was indeed loss of the highest type of Christian sanctity: actual Sainthood).

But now we have inherited a public realm is which science and medicine, as well as politics, administration, law, literature, news and gossip... all have been purged utterly of Christianity, and (for Protestants, at least) there is no hope of any escape from this daily, hourly worldliness which now reaches deep into the churches.

Source

Which leaves one to wonder, if Protestantism inherited a world of faith, and lived off of it, and now leaves us a world of despair and doubt, what went wrong?