The "Spoon Theory" aka
"You Don't Look Sick"
https://butyoudontlooksick.com/articles/written-by-christine/the-spoon-theory/
If you haven't read this, take the time. don't ask us to "push just a little harder."
The energy that we're saving in the moment is most likely needed for the nightly tasks the others take for granted like feeding the animals and similar activities or just actually getting in bed.