What are the reasons for German Bishops who favor the "Synodal Path" for not just becoming Protestants?

I was reading an [interesting article](https://www.ncregister.com/blog/pastor-of-luther-s-church-synodal-path-is-the-wrong-path) on the National Catholic Register where the pastor at Martin Luther's church in Wittenburg said he thought that people who disagree with the Catholic Church and fundamentally want to change her, or democratize her, should just become Protestants instead. Owing to the citation that Catholics are leaving the faith in droves in Germany over the [last few years](https://www.ncregister.com/cna/survey-one-in-three-catholics-in-germany-thinking-of-leaving-church) what reasons or justifications do Bishops and Cardinals give for continuing as Catholics instead of just leaving with their congregations?