3 main reasons why you need to learn not to give a fuck:
Take control back to yourself. You will no longer depend on the outcome and therefore, nothing will hold you back from doing what you want.
Stay focused. When we give too much damn about everything, we will easily get distracted and therefore, we will not be able to do anything well. However, when we stay focused, we will easily accomplish our goals.
Improve mental health. When we give too much attention to things that are not truthly mattered, we will easily get upset, disappointed, and frustrated. However, when we only focus on what only matters, anything else will become less important and therefore they will NOT affect our mood greatly.
The truth is we often give way much attention to things that are not mattered than the ones that do. Therefore, the art of not giving a f*ck is simply that you give fucks to only the things that matters more in your life. So choose wisely what matters in your life!