That's an interesting conviction.
It is my conviction that a large number of married Catholics in the US have apparently had zero intention of following Church teaching on contraception when they said their vows.
Are you arguing that this glaring defect of intent is not common?
I’m sure you are right about that. I don’t think practicing birth control, or intending to do so, is grounds for an annulment - at least not if you have any children.
It’s an interesting angle, though, one I’ve never run across.