I honest believe Fulton thought he could win the fight. Once he felt the power, that's when everything changed. The first big punch landed at the 8:00 minute mark. You can see the reaction and his how the game plan changed afterwards. He became wary of getting hit again and his confidence went out the window. This content is protected
Yeah, that's a thing that really bugs me about some of the US fighters, so many of them adopt that dumb ass wide split stance. I get they are trying to be balanced and get leverage on their punches but I just don't think it's worth the loss of mobility. You never saw Mayweather do that and Loma and Usyk don't do it. Neither does Fury, in fact any fighter with good movement would never do that wise stance.
It's a good choice if you're planning on staying in the pocket and counter punching. Norton made it work extremely well for him. Fulton didn't have the sharpness or defensive nous to do it properly though, which just meant he kept getting hit by stuff because he wasn't able to leap back out of range.
Slick black boxers don't learn pendulum and rely on rhythmical steps with small upper body movements and feints to adjust their stance, they find out early that a wide stance is comfortable for this and thus end up developing bad habits, best of them get away with it because of great reflexes, instinct, and fast hands, those who fall in love with their own bad habits get punished for their shortcomings when faced with Elite opposition, like Fulton did. Look at Bivols footwork, notice how far apart his legs are? Difference is night and day, he's a master of pendulum stepping, while Fulton is shook the moment a fighter with superior speed crosses his way, Bivol is throwing fat bombs in combinations and stepping out of hitting range as if he's a floating alien regardless of who's in front of him, Naoya is absurdly bouncy and the Japanese pendulum is more narrow than the eastern euro one can be, but their basis is the same.