He had experienced the difference in power in nearly every fight that he had in the Senior Realm and most fights he had in the Squire Realm. His raw physicality was holding him back since he hadn't cultivated his raw power over extended periods of time.
He was definitely open to getting some treat to amplify his raw power.
He also learned why the difference in Martial Body didn't seem to exist between Martial Artists of vastly differing generations.
It was because they employed expensive solutions to close the gap, according to the revelation of Master Zentra. It made sense that he had never heard of this before. Especially if they were highly rare and valued.
While the Martial Body was the most ubiquitous and mass-producible means of empowerment, it was not the only one.