I'm not following how these two issues are related, but my statement is accurate. Mormons believe that the greatest blessings in Heaven are reserved for married couples. Now argue that that's not fair, if you want, but it's absolutely false to say that a woman can't get into Heaven without her husband's permission.
The way its related is in that a person in a priesthood would have a "Higher" level of heaven while that is necessary in order to attain that level while a woman cannot achieve a priesthood and therefore a single male can go further in the church. Not fair? Perhaps not, I don't really see why women can't have the priesthood as well but thats me. I wouldn't think anyone needs a husbands or wives permission, just gods permission. I do understand that married couples get the greatest blessings so I found it interesting, your statement about single peoples.