It rarely makes sense to generalise from an individual person to the scale of the whole population.
Whether we can generalise from an individual to at least one other person (if not a small quantity, say, 100, or 1000) is not the same question. Things can’t be made devoid of all context, and context is very often shared.
Making something for yourself—or for one or two people in specific—means that there is a likelihood it will make sense to at least a few others, but effecting that also means be willing to share the thing.
This type of generalisability seems like a reasonable aspiration for artistic projects.