Deep Game knowledge and understanding of champions and othehttps://boards.na.leagueoflegendsr things

When i first heard about LS(ex coach for Gravity Gaming) i immedetely entered his yt channel and watched some of his coach videos and vods. And i've been rly curios, how that guy gained so much knowledge about the game(generally all the coaches), how they approach to MOBA and have such a deep understanding about the game. About what's the champion job let's say or what's are his strenghts and weakness, what is he capable of doing in. Why are the certain champs in meta in each patch. What brought them to meta, etc. if anyone could give me some information how they gain some knowledge and how they understand the concept of the game itself. I always played for fun, but now i wanna try to learn more about the game so i'm rly curious.