Getting good in almost all games is based on understanding and mastering the fundamentals to the extent that you can make consistently correct (or at least a high degree of 'correctness') decisions based on them. This is true for all esports titles, and probably all games in general. Mastering the fundamentals will make you 'good' to a level that very few people ever reach. It's not until you reach a level where ever…
Getting specific on the skill works very well on simple FPS games, just like bots are easily beat all of the top players. Basically this is true for the games that rules are extremely simple, there's no place left to play the metagame.
While a lot of games with sufficiently complicated mechanisms where people cannot process accurately, meta could come into play. For example, people spend quite some time making the computer beat human in the chess game, when human only have some not accurate meta experience.
Also, meta is probably the most useful skill for learning new games. A decent RPG player would infer the plot and mechanism in new RPG games, whereas a strategy game player could quickly find out what's the trade-off between all the viable options much quicker than others. A player with all genres experiences can adapt any games real quick.