Deciding To Marrying Once, But The Woman Is Infertile
Things are not just sin or not sin. It can be good or not good or preferred or not preferred. to be sin, a things needs to be qualified to immoral or unethical. The prophet’s advice was a suggestion, the same we do. no one would like at the first place to marry an infertile man or woman. To have children is the primary goal of marriages. if man or woman prefers to have children they have right to end the marriage. in religon, it is allowed to break you oaths and then compensate for breaking it as God knew that man cannot know the upcoming circumstances. therefore marriage or promise to marry can be revoked with an apology. This is how life goes.
Religiously I don’t see a problem marrying an infertile women, but what if once you age and passion and love subsides and overcome by practicality and you start wanting children, then what would you do? A good and loving women would nderstand the legitimate needs of her husband and never stop but encourage her husband to go for second marriage instead of taking a divorce. Other solution could be to adopt orphan children and reap double the benefits of having a family and earning rewards from Allah.