its not that easily, usually black gets counter play since you have tempos may decide whether you win or lose. if you go O-O then it Bayonet attacking would leave some weaknesses. if you go O-O-O they can go c5 - a6 - b5 -
How do you attack the king fianchetto?
Yes of course the game is not gonna be won just because your opponent fianchettoed his bishop, CMON man @Ihavethecoronovirus
WHITE SHOULD KEEP HIS KING ON F2 AFTER F3 OR CASTLE LONG.. .. THERE R MANY GAMES ON THIS SET UP.. SEE SHIROV BEAT TIMMAN IN GRUNFELD..
I exchange that king side bishop. Then opponent is left with the weaknesses around his king.