She wish she could do that. She can't tho.
She needs Zoro's assistance.
Zoro has yet to show he accepted to back off and ignore Orochi, Shinobu said Kaido was the only one important not Zoro. He didn't even react to Orochi's death.
He still wants to avenge Yasu, Momo is a kid and Hiyori can't use that sword.
Perhaps if she has to do her best to protect his half dead wannabe husband and Orochi attacks them..
But Zoro has to stay down for long in that case