As simple as possible to summarize the best way you can, first, please. Feel free to expand after, or just say whatever you want lol. Honest question.
With that all being said. The biggest misconception and frankly appalling misunderstanding anyone makes in this, is that one person is valued less than another.
Aren't they though, by definition?
Value: An amount, as of goods, services, or money, considered to be a fair and suitable equivalent for something else; a fair price or return.
So if some people get more in return (what they get in the afterlife for accepting The Lord), they're valued higher. I don't want to put words in your mouth, but I think what you mean is you don't think some people are, in essence, better. Just the degrees of glory mean some are valued more though, and that's not going into the husband/wife aspect.
Kingdom's of Glory then becomes a choice we can make to get to. Like in my other comment. Some people will prefer pepperoni, some supreme, some pineapple.
Yes, it's a choice, but some people get nicer outcomes based on their choice, and that choice is not made any more obviously correct than the choice of any other religion.
If God is good, why would he make us make this choice and make it just a guessing game? I know the answer you're likely to give is that it isn't, and if we pray the answer will be made clear, but people believe with extreme faith (often more than most in the LDS have) that they're the ones who believe the truth, and they're certain that they've felt the presence of God(s) and they told them to follow this or that faith.