Prove it. There is a huge gap in skills between them. Kaneki is capable of fighting several opponents at once comparable to him in speed, has an instinctive reaction, scales higher than Yoshimura, who fights 3-5 high-class veterans, each of whom is comparable to ghouls, who can kill 100 investigators, including 34 Special Class Investigators. Kaneki is at the level of Arima and was able to surpass him, and Arima in turn destroyed Shachi, who is an experienced martial artist who uses combat predictions and reads opponents. Kaneki is in a different league in skills from them.