Being able to work hard and take time to get good at what ever you are doing to win is hard. You have to take a lot of time and practice to be able to do good at what ever you are doing. If you play basketball you have to practice shooting, handling the ball, and defense. If you practice at these tasks you will be able to get really good.
It is way easier to lose. If you don't practice and you don't take time to work on what you are doing then you can't become good. If you don't put in the time to get better then you can't win. If you work and practice you can do better and have a better chance at winning and not losing.
Even though losing is easy it is not fun. If you put in the time and energy then you can win. Losing comes without practice if you don't practice there is no way you can win. Winning takes time and practice. It also takes repetition, doing the same thing the same way every time. Winning is hard but way more rewarding, losing is hard because you know that you could have done more for your team.