Luck is non-existent, in my opinion. Everything in my life go smoothly if I prep all the things before. It is hard-work that makes me go further in life.
Some people achieve more things in life than the others because their upbringing is different from others. They have different challenges. In short, everyone has different challenges and they get everything they work for.
It's really important to work, actively work towards the outcomes we desire as that's what brings them closer. So many rely on chance, take a passive role in their lives, and then wonder why they don't get the results they want.