Expecially when she proved to be good enough to overpower Ulti with absolute ease.
That's comparable to Zoro proving his superiority over Hawkins.
Full power Yamato is probably stronger than Pre Enma training Zoro without Asura.
If she got a neat devil fruit she is as well more powerful than that, and more YC1 level or something I suppose.
I know not what this Proving something over Hawkins is, As he's the bottom feeder of the Supernova's, he's like a glass cannon but has barely shown anything besides the Strawman.
Yamato is solidly above Ulti.
Like how UIti is solidly above everybody but the Flying 6, All Stars and Kaidou.
But I think he was talking about Black Maria, he was dissing her.