I’m not saying that the mere existance of annulments are themselves “loopholes”, but that they’re used as loopholes…that an annulment is often times sought obstensibly because the marriage violates canon law, but in reality because of personal incompatibility, or because one of the two wants to marry someone else, or whatever.
Take, for example, the case mentioned earlier…that of Louis VII and Eleanor of Aquitaine. Eleanor and Louis were third cousins once removed…Louis was the great-great grandson of Robert the Pious and his wife Constance, as was Eleanor’s father. This made Louis and Eleanor consanguneous in the fourth degree. Church law at the time declared that incestuous marriages were forbidden, and that incest was defined as consanguinity in the 7th degree or closer, among other things.
So, clearly, the marriage was in violation of canon law, and their blood relationship was known at the time of their marriage. Nevertheless, the marriage was conducted, and the two of them lived as husband and wife for 15 years and had two children.
After 15 years marked by constant fighting by the two of them, and the inability of Eleanor to give Louis a son, and against the advice of Louis’s bishop and the Pope, Louis and Eleanor “discovered” that they were within the forbidden degree of consanguinity, and got an annulment on those grounds. Eleanor then, within about two months of her annulment, married Henry II of England, who also was related to her within a forbidden degree of consanguinity (although they might have gotten a dispensation from that rule…I’m not sure). Louis would eventually go on to marry Adele of Champagne, who was also related to him within a forbidden degree,
This series of events does not suggest to me good faith on either Louis’s or Eleanor’s part, and that the annulment was not sought because both of them felt that their marriage was invalid, but instead because of general incompatibility, along with Louis’s desire to have a son, and Eleanor’s desire to marry Henry.