Maki could miss on her first strike, get slammed by gravity, get pummeled by numerous cursed spirits, get outperformed by Kenjaku. Keep in mind Kenjaku beat Choso and Yuki, with Tengen’s help, with Yuki’s ct being unknown, with Garuda, and had a black hole dropped on him.
Maki’s the same girl who couldn’t put down a nerfed 15f Sukuna with Yuji’s help. If a soul katana, and good senses could take Kenjaku down they would’ve made her go after him even before Gojo got unsealed. Oh and she’s not invisible with that soul katana, cursed tools give off ce Kenjaku would’ve spotted her far away given his cursed spirits relaying him shit seeing through them