That is quite hard to marry up with
> Not being afford something is a 'pretend' state that only exists because everyone agrees to go along with it.
though. If there are n people who want things and (n-1) things, then someone being unable to afford something isn't some pretend state. There is certainly an element of social construct in that the word we use is "afford", if we all agreed to use a different word that'd be possible. But the thing/people ratio being below one is not a social construct; and whatever you want to call it and whatever allocation scheme you want to use there will still be people who can't have one. Someone can't afford the thing.
> You being unable to afford something isn't some fundamental property of the universe.
In many cases it is. Eg, topically, how much economically extractable oil is available on earth is actually a fundamental property of the universe. Ditto most energy emasures like watts of solar energy or power from nuclear decay.
> So given that you see humans as being beyond terrible at allocating resources, why do you think, if they were relieved of having to handle resource allocation, that they would suddenly become not terrible at everything else in order to see all of those other problems magically disappear, per the contextual parent comment?
Well I suppose I don't. Although I'll admit the question is too convoluted for me to be sure of that.
> how much economically extractable oil is available on earth is actually a fundamental property of the universe.
Affordability requires something to exist. Once all the oil is used up it won't be affordability that prevents you from obtaining some. As oil still exists, your ability to afford it is entirely a social construct. There isn't some fundamental property of the universe that prevents you from having that oil. The only thing standing in your way from not getting the oil you want to have is what people believe. Again, resource allocation is entirely a social construct. Scarcity is the reason for that construct. Allocation is not a thing where there is no scarcity.
Energy is definitely a better example than food. There is enough food produced to feed the entirety of humanity, probably several times over, but the social and political problem of who the food gets distributed to is the limiting factor, so hunger exists. Same is true for homes. There are enough homes to house everyone, yet homelessness exists. I'd argue we are already post-scarcity for many things, but distribution is socio-political and therefore deliberately uneven.