I think there were a few years to that process. Again it wasn't after the 95 theses went up and the Church said "wait, this luther is right."
Yes, it took years and years to clean out the filth in the stable. The Counter Reformation that we all learned about. And there's still plenty of filth in the stable today, as everyone knows and the current Pope has said.
Luther was right about many things. Not everything. But many things. And I fully admit that the sins of Catholics helped push him to where he eventually went.