-Sometimes you have to fight for things because "there are all kind of people out there" you need to fight, be prepared and try to defend from people who are ready to take someone's right away, people who use others as their progress ladder, people who don't care about other's lives, people who back stab, people who lie easily, people who con easily. You have to fight it back to win against them.
-The other type of "fight" which also you point out as "Nothing is easy, you have to fight for everything you get"
-Well, Of course, why it would be easy ? When you earn easy you lose easy, Success is not easy, it needs courage, it needs an organized life, it takes braveness, and my "Triple S" formula, "Sweat, Suffer, Sacrifice" otherwise ? You'll be nowhere, you need to try hard, fight hard and show that you have strength, that you are ready to get what you really want, well you need to prove if you really deserve it, and the only way to prove it is to fight endlessly and not giving up by any cost, to keep moving forward and try to be better day by day, then you'll have it, and when you have it after passing all these, you know what it takes to be here, so you won't mess it up, you won't waste it but you'll glow it more and more to shine and not fall down right after you reached it!
Success is always hard, specially for those who want to live it. (success can be named as anything to not lose the concentration to your question)