I know a guy who got two annulments like he was ordering a pizza.
they’re not that hard to get. Why not go down that road.
Annulments have certain requirements (especially an existing situation at the time of the marriage) that aren’t easy to meet; when the spouse fights the annulment (as Ted Kennedy’s wife did) then it is even more difficult.
I suspect the divorced/remarried Catholics that want the ban lifted have already gone this route unsuccessfully.