The divorce is to satisfy the state requirements. The Church cannot annul a marriage recognized by the state.
Simple answer.
NOPE. Where did you get that information?
The Church investigates and may determine that a legitimate marriage never took place. It has NOTHING at all to do with government 'status'.
As well, a civil divorce is meaningless technically; just as meaningless to the Church as a civil marriage. The Church recognizes cases where a civil divorce may be necessary as a last resort in cases of abuse or infidelity when financial issues require it during discord in the relationship. Again, the divorce is simply a legal action that has nothing to do with validity of marriage.
A cause for divorce at one time had to be proven. In those days MAYBE the Church could rely on civil courts to lend legitimacy to causes for divorce/separation of spouses. NOW, however, with no-fault divorce that assumption can never be the case.
Those in the Church who at one time may have allowed and or required a divorce as proof that the relationship suffered legitimate discord can no longer rely upon a divorce decree as anything meaningful. In fact, no-fault tends to damage severely vestiges of potential hope in salvaging a damaged relationship as it tends to be a splitting of the baby in half process with only the predetermined outcome assured.
One could say as I would agree that requiring a divorce before a tribunal investigation is comparable to cutting a baby in half before determining if the baby is alive. It's just plain DUMB...