I'm not a Gamboa fan in the slightest... but this is a pretty one-sided analysis.
How many times has he gone down and been genuinely hurt? How many times has he had to survive a round?
IIRC most of his knockdowns are as much due to him being off balance as they are with people landing big shots on him. Obviously it's not a good thing and as he faces more and more power punchers it's something he'll need to work on but it's not as if he's been made to fight life and death in bouts.
Two points:
1) While a lot of Gamboa's "skill" comes from his natural attributes and (as this fight shows as much as any other) when his speed and power don't either blow people away or dazzle them out he's not exactly a raw slugger in there. Who are the other fighters at FW who you'd called more skilled? Chris John and Caballero are the two obvious choices but after that it's a struggle? Ponce De Leon? Bernabe Concepcion? Elio Rojas?
2) Ring magazine currently rank
Salido at No. 4 in the world, down from 3.
If you can't see the innate natural ability of Gamboa and how if properly harnessed that
could make him one of the great boxers of our day then there's an issue for you... and him being a Cuban gold medal winner is part of that.
It wasn't a great performance, it was barely even a good performance, but Gamboa still handily beat a guy the Ring ranked top 4 and was a tough veteran who never stopped coming forward. In terms of development it was a far better win for Gamboa than if he's wiped him out in 3 rounds. Gamboa is still clearly adapting to the pro-style... the fact he could blow out most opponents previously covered up his deficiencies... and that showed in this fight. A fighter like Gamboa needs these performances, need to see that he has holes in his game and needs to be forced to work for 12 rounds.
His next fight should be interesting. The WBA has recently mandated a unification between Gamboa and Chris John (which as they're currently No.1 and No.3 ranked would also give us a Ring champion). Can John's style pick apart the at times wild Gamboa? Can Gamboa's sheer youth and physical ability tear through John? Is going to suffer the same fate Calderon did, his age catching up with him against a younger, fresher challenger?
And can Celestino Caballero ever get a fight?