Sounds like a system that can easily be manipulated.
Honestly, the annulment process is really difficult. It’s not so much a matter of property division, which is why a civil divorce is necessary first. This is more about the most intimate details, which must require vernal and written testimony from both parties and from witnesses; canon lawyers, and a tribunal. I know the head of the tribunal in our diocese, and he is one tough customer! It truly is not taken lightly. Irreconcilable differences are not grounds for annulment. A lot of personal, embarrassing, hurtful things go into it, and both parties must participate actively...
Good point! The situation arises more from withholding information, than of what occurs later, as in the case of latent homosexuality. It's a matter of full disclosure of known information before marriage, so that both parties can make a decision with their eyes wide open.