Originally Posted by
The Drunkard Kid
The weighted clothes thing is kinda a major repeated bit of nonsense that is drastically inconsistent with all their other strength showings, to the point where my personal headcanon is that DB-Earth assigns different values to weight than what we use on real Earth. That said, regarding the scene with Goku's training at the start of the Buu Saga, there's a couple of asterisks on that weight, what with it taking place on a planet with unknown gravity (with at least one of the people in that scene being a guy that lived at 10G in all his previous appearances), and with Goku starting off the scene already drenched in sweat from having been training for an unknown amount of time up until that point.
As for Tao Pai Pai being massively stronger than anyone up to that point (barring Arale), that was pretty much explicitly shown when he casually murdered General Blue with just his tongue despite Blue having at least Kuririn-level stats up to that point, especially with regards to durability, then pretty casually nearly murdered a kid Goku who had just held his own against a still mostly extremely out of shape Kamesennin. And then we get the reveal that Tao Pai Pai was the younger brother of Kamesennin's centuries-old peer, Tsurusennin, and had been the guy that trained Tenshinhan (which motivated Tenshinhan enough to get him to the point where he was able to keep more or less dead even against a Goku after 3 years of training post-defeating-Tao-Pai-Pai).
Yamcha was generally portrayed as weaker than, or at best as strong as, Kuririn since the first time they met (where Yamcha learned that Kuririn was a student of Kamesennin and basically went "well, there goes all my chances for victory"). He even did better against Goku than Yamcha did against Tenshinhan, though in all fairness, Tenshinhan was just generally way more vicious than Goku during that period, and Kuririn impressed a mostly unserious Piccolo at least as much as Yamcha impressed an even less serious Kami-sama, and I think that surviving a moderately serious hit pretty much unharmed from a Piccolo who momentarily forgot to not use lethal force (and pressing him hard enough to actually make him forget to hold back as much as he was planning to) was a notably better feat than landing a trick shot that drew blood on a playing around Kami-sama (who was possessing some random schlub, but with no indication that his stats were actually reduced at that point) who then proceed to precisely one-shot Yamcha.
As for Yamcha not explicitly shown having global level sensing, I guess that's technically true though probably something fairly hand-waveable since that was something that Goku seemed to have been able to do by the time of either his final battle with Piccolo Daimaou or his battle with Raditz, and Yamcha was way more powerful and skilled than Goku was during that period by the end of the series. That said, Naraku never left Japan (except to go to the afterlife once or twice), so that's not really relevant in my Inu Yasha bit, though if anything is going to make Naraku try and emigrate, it's probably a fellow former bandit always coming over to cave in his face every time he peeks out.