How did you come up with that percentage? Have you ever played CS?
Firstly, OP basically said that CS is not a strategic game at all, which is completely false.
Secondly, CS can get extremely strategic in the professional scene, but it is also quite strategic at higher ranks in the game's competitive mode ladder. It is also a heavily team-based game: e.g., if one of your team members is not communicating, you are at a huge disadvantage.