Purpose
Finding a purpose in life is important for a few reasons: one, it helps figure out the direction you want to move ahead in life, second, you don't want to spend your entire life repeating the same stuff every single day, third, life is about working hard and having purpose solves half the problem in terms of understanding what you want to achieve.?
Philosophy has a deeper meaning to the term purpose. I don't want to go into details here. But from a logical perspective, I think, purpose is important in life because it gives meaning to every action you take. Why do you want to go to the office every day? Now, you can answer to that question with full energy because the purpose or "why" is clear in your head.
Imagine living a life where you have to simply do things because you have to do them. Imagine saying how miserable the weekend would be at the end of every Sunday night because the work you do has no meaning in your life.
The purpose is bigger than our short-term thinking. It is for the purpose that we do things that might not be easier, but find joy in doing it because there is a reward in accomplishing the output of what you call may call purpose.
The purpose is a "why" that every human should know about, no matter how hard it can be to figure out the "why", still one should find it.