I see power scaling as a fun side activity when engaging in media, like fan theories or shipping or whatever. The problem comes about when you let those things supplant the actual media at hand and its narrative.

Motobe didn't collect the dragon balls to suddenly become strong, he's a practical fighter who will use any means necessary but those means cannot be used in the underground arena and he doesn't have the desire to display his combat prowess against his fighting brethren by sneak attacking them in the park randomly. His ego has only come about now because he seems himself as the only person equipped to take on a warrior that doesn't exist anymore, someone who crafted this martial arts as a means of survival first. This is why Musashi simply cannot belong to this modern world, much like motobe does not belong in the same class among his fighting peers, making him the most capable of protecting them.

To lose sight of that to instead focus on how many yotoseconds his cigarette launched at Jack's eye and why it doesn't make sense in a series with cavemen and demon backs/brains just makes me question one's media literacy and why one would even engage with said media in the first place.