I think that is overstating the relevance of the printing press vs existing power struggles, rivalries, discontent, etc. - it wasn't some sort of vacuum that the reformation happened in, for example.
Religious schisms happened before the printing press, too. There was the Great Schism in 1054 in Christianity, for example.
Religious schisms happened before the printing press, too. There was the Great Schism in 1054 in Christianity, for example.