This take is weird to me. Yamcha has a lot of fighting experience, including implied off-screen feats. He was a bandit before meeting Goku, which means he likely fought and survived plenty of battles we never saw.
Also, it’s just not accurate to say he has no feats. Yamcha has multiple showings throughout the series—he defeated a Saibaman, and in filler/other material he’s shown keeping up with or outperforming fighters like members of the Ginyu Force, who gave Krillin, Gohan, and Vegeta serious