Knowing it is very important because it prevent a lot of things from happening, I no that some persons can be ignorance to what it might caused them but is very important to avoid wrong mixture because a lot of issues people are having today is marrying someone that is not compatible with them, if you are AX and still marry someone who also have the same genotype it becomes a serious problem.
No matter how much you love that person whether man or woman don't be blinded by love to continue the relationship because you are not going to have the problem but the children you will be bringing to the world.
Blinded in love to marry a person your genotype is not compatible with is the greatest wickedness you'll be doing to your unborn children. In the primitive age of our parents they had to marry out of ignorance to what genotypes are, they I can forgive for their ignorance.
But in this present world with advancement of science that have brought to our knowledge the importance of matching genotype for intending couples, and people still make the mistake of marrying when their genotype is incompatible, that I'll never forgive. You can not for your selfish satisfaction bring into the world children that will suffer all their life.
No man or woman is irreplaceable that you'll have to sacrifice the wellbeing of your children yet unborn just to stay with them and be married. Exception can only exist where the two couples agree not to have kids.