No need to be snappy, TxTrad! I did read what you said, and I re-read it before posting! What you said needed to be corrected to avoid confusion.
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Of course "some women choose to stay with a spouse where she has legitimate grounds for annulment" I don't dispute that. Or she may already have left him before petitioning for an annulment.
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But annulment is not a matter of choice for the woman. The woman has not the right to determine whether she has the grounds for annulment. You are confusing the right to apply for annulment with the right to separate, which is not contested if the relationship is untenable.