How many Christians get a divorce and remarry in another Christian church? Quite a few...and I include Catholics in that as well...which is why they leave the Catholic Church and go find a Christian church that does remarry...
The Catholic Church simply renamed it "annulment". Besides, Who told you that all Protestant "churches" were correct? Protestant "churches", the Catholic Church, and individuals can all be in error. The Catholic Church is no better then some Protestant "church" when it comes to error. Employing and protecting homosexual priests is no better then some Protestant "churches" allowing homosexual pastors. Allowing those with resources to get an annulment is no better then some Protestant "church" allowing divorce.
They don't need to leave the Catholic church to leave their spouse.
All they have to do is pay someone off and get an annulment.
annulment = RCC sanctioned divorce