She becomes throw vulnerable after her invincible frames, yeah, but that stomp has tons of block stun. You’re not going to punish/interrupt with a throw. You certainly won’t grab her if she follows through.
If you throw dragons into the mix, there’s ways the move can become over +20 on block.
Hisako has the edge fighting Kim, but it’s through dragons that she can make Hisako second guess things she would not normally.