So you consider an abuse victim who remarries to be in mortal sin?  Does a woman who is beaten by her husband own him fidelity?  Is that what you want to go with?  

And conservative Catholics have decided to look down on whole groups of people they don't like and exclude them from the Sacraments en masse.  Amoris Laetitia states that it is wrong to treat all remarried people the same and exclude them from Sacraments.  Circumstances matter.  An abused woman who courageously leaves her abuser and later rebuilds her life and wishes to remarry is different from a rich sleaze who wants to trade in his wife for a younger model.