It is a much different thing than having to take care of a child, not being a native speaker, or having a sick spouse, which describe additional difficulties onto an otherwise functional human being. Spoon theory explicitly applies to the context in which fundamentally functional actions like self-care take significantly more resources than expected.
I have some concern that this is actually a dilution of the original meaning such that it removes its original usefullness to the chronically ill community, which has to deal with the stigma of being potentially severely limited with an "invisible" illness, and the spoon theory was an attempt to describe the "invisible" illness's effect on a person's life (therefore aiding in destigmatization). By diluting the original meaning, we may be contributing to the continued stigmatizing of "invisible" illnesses, as now spoon theory is changed to mean something almost opposite of its original meaning.