You chose to sell the apple. The most eager and capable buyer buys it. Capitalism.
You could choose to give the apple to the hungry person. You might choose that because you want their help in a different way. Or because you feel it is right. Or they are your kid. Or you give it to the strong person to have a better alliance.
Or you could have the apple taken from you. You might even have more taken, like your life. The other side has a say too! They both might believe that you shouldn't have it and (might makes right, right?) capitalism wont save you there.
That we don't (or do) take by force is a social construct. That we choose to instead honor an imaginary dollar tied to the intrinsic ability of our government to service its own debts is a social construct. Or the idea that maybe we should split the apple or plant it to make more apples. I can imagine a parent with two kids: "fine, nobody gets an apple, it goes in the trash since we can't agree." Nothing here is "one natural order." It is what people decide. And why they decide is based on squishy human reasoning. Social constructs.
... and then the dust settles and you discover that despite running though 7 scenarios the most any person has is 1 apple. And if one person has an apple, the other persons do not. Suggesting that affordability is not entirely a social construct.
I'm on board with people getting excited about living in a society, it is all pretty magical. But affordability isn't some random social construct, it is in great part about physical limits. Unless you want to redefine what words mean which is always an option available to us.