Why do people love to put up excuses to not make sacrifices or changes that are challenging in order to achieve a goal?

A perfect example is working a lot at your job to gain reputation or respect.


Or eating better quality food and exercising in order to achieve a “desirable physique”


I don’t get it, cause we all basically want the same things but some people don’t like to put in the effort to achieve those things yet bitch constantly about not having those said things/goals
Why do people love to put up excuses to not make sacrifices or changes that are challenging in order to achieve a goal?
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