
... no, the free exercise of legitimate papal authority cannot possibly wreck the Church so badly that we must leave submission to and communion with the hierarchy in order to remain Catholics, where they effectively establish a New Religion alien to the Catholic Religion.
It's not about receiving graces, but about receiving the office of the papacy. You would be a wicked occult apostate, and you would receive the offices even if no graces of the office. Of course, if you received the office, God would strike you down before you'd be allowed to corrupt the Church's teaching.
As far as God allowing it ... well, of course God allowed the Crisis, but it does not mean he would somehow renig on the Promises of Christ for the papacy, but instead would allow it to happen in some other way.
There's so much muddled and even non-Catholic thinking about the papacy among Trads that it's mind-boggling.