Sakura was using kid glove she wasn't even trying to fight.
Why use a Kunai when your hand are killing machines, she wasn't serious, at all.
Because her fists lacks what it needs for what she intended first hand: Silent murder.
By putting chakra in her fists, she would have been noticed by sauce. And when you lack speed for that kind of attack the kunai is the best choice.
Before acting almighty, try to remember that shinobi are in first hand Spies and assasination specialists. Reading naruto made a lot of people mind rotten about Ninja.
She isn't strong willed enough.
And she lacks the chakra control.
Who is a cry baby over her sasuke-kun from all the series ?
Who didn't had the guts to go all the way she wanted because she is a ***** ? ( no dirty jokes here , thanks)
Who is strong willed enough to not run to save his friend facing death ?
Who is sad facing the fact that her lovely as**ole sauce didn't noticed her ?
Hinata is as strong willed than her when it matters and she have chakra control because of her lineage.
You want to discuss and debate. Fine, but don't put your dirty wanking and bias reading like they are universal truth. This thread doesn't need it.