I don't really know if I'm comfortable applying spoon theory to contexts outside of disabilities (and even outside of chronic illness). In the context of chronic illness going out of one's spoons has serious, long-term, immediate, and maybe debilitating repercussions for the person in the management of their condition. The original context was that someone has like 10 spoons that day, and showering is 2 spoons and clothing onessels is 2 more spoons unless a piece of clothing has buttons which makes it 3 spoons due to joint pain in the hands. This was in order to show how incredibly resource intensive chronic illness management is and how it limits a lifestyle.
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.