I would also argue that the dice are a mechanic meant to force you to change tactics. You can't walk in to X-Wing with a prefabricated plan because the dice may make break that plan. Your job as a player is to A) mitigate the effect dice can have against you, B) maximize the effect dice can have against your opponent, and C) put yourself in a position to change tactics when your dice fail you. If you go all-in on each and every roll, you're dooming yourself to failure.
I was going to say "unless you're flying Triple Scouts", but I just recalled a game two weeks ago where my opponent rolled 4 focus, spent the TL, got 3 blanks and a hit.