The article is mostly talking about life goals or ambitions:
“There are times when goals make sense. Training for a marathon. Preparing for an exam. Trying to ship a product by a hard deadline. In finite, controlled, well-understood domains, goals are fine.
“But smart people often face ambiguous, ill-defined problems. Should I switch careers? Start a company? Move cities? Build a media business? In those spaces, setting a goal is like mapping a jungle with a Sharpie. Constraints are the machete.”
“Do you want to be someone, or do you want to do something?
“Goals often come from the first desire. Constraints come from the second.
“One is about image. The other is about identity.
“And the latter has more room to grow.”
There is a better article hiding in there, but I think it is making a good point.