My friend (lvl 10 faceit in cs, and GE) says that aim training is pointless. He said that all I need to do is grind the game and aim training won't help me as much as just playing the game. He tells me that I need to work on my game sense, and aim training doesn't take recoil and crosshair placement into account.

What's mainly holding me back right now is aim, my game sense is alright but could be better.