I think you're undervaluing him. Carr DID move up and beat Yori Boy. Campas wasn't "shot." He was 74-3 for god's sake. Campas fought for another 16 YEARS. Campas beat Ayala in his next fight and De La Hoya fought Campas on PPV four years later. I don't know where the hell you get "shot" from that. Carr fought Oscar, Tito, Quartey ... arguably the three best welterweights of his era. Which one of those does Danny Garcia beat - Oscar, Tito or Quartey? I wouldn't pick him over any of them. Carr was a welterweight. He fought the welterweight champs. He didn't campaign for the junior middleweight title because he wasn't a junior middleweight. He was a welterweight. That was his best weight. And he should be applauded for not going after some pathetic champ or some easy vacant WBO belt. The champs of his era were just better than him. There were plenty of welterweight champs in other eras who weren't better than Carr. None of the welterweight champions right now would arguably have a belt if they had to take the title from Oscar, Tito or Quartey. Shawn Porter is no Ike, Tito or Oscar.
You didn't watch Carr against Campas. Campas was terrible. He was finished after Vargas beat him. An equally shot Ayala--who accomplished nothing in his career besides being a despicable piece of crap btw--quit while ahead after breaking his hand on Campas' head. And that's probably Carr's best win. Campas continued as a shot fighter for sixteen years, correct. It's disrespectful to him to say otherwise because he was once a good fighter. Garcia is above his best weight already and he fought a who's who at 140. Carr doesn't have a single win against a really good fighter. He was fortunate to be granted all of those paydays. Carr was still viable and relatively young when the 147 guard started changing hands in the late 90s. Tell me how many of those titles he won. No Page. No Six Heads. No Lopez. No Mosley...Spinks, Mayorga, Piccirillo, etc.