No, you didn’t. Sometimes you have to read more than the title to know what the topic is.
FYI you are describing the pop-psych concept of "Ego depletion" which was in vogue ten years ago and then rigorously researched and thoroughly debunked five years ago.
I wouldn't say it's thoroughly debunked or rigorously researched. More studies need to be done. Decision fatigue is also a slightly different concept from ego depletion.