@Dramsss
Your interpretation is too restrictive. You have stated that
in a fighting manga all fights results are used to further develop the characters
but that's incorrect. It's not only about developing the characters, but also about developing the story. Additionally, the events within the fight are far more important to develop a character than the result of the fight. In the case of the current tournament between Purgatory and Kengan, in order to keep this tournament exciting, it's a safe bet that half of the Kengan fighters are going to job.
You wouldn't have said "Rihito is going to looooose? :0"
That's essentially how I meant it. There's just some added nuance as it concerns a fictional fight which is why I used job instead.
Besides, if you couldn't tell by the number of o I used, that comment was tongue in cheek. I mean, I don't even think Rihito's going to job this.
Do you really think that every opponent of Kuroki were jobbers?
Just because you job once doesn't mean you're a jobber. I would consider a jobber to be a recurrent character who jobs and certainly not a character who is never seen again.
Your definition sounds more like padding than anything else. Yup, we're going to have to call those guys padders.
Your interpretation of the definition is wrong.
Your argument has not convinced me that it is. Unlike you, I still do not see any contradiction in being impressed by a character who jobbed, among other things.
In the case of language and meanings, if everyone is collectively using a word with a certain meaning, then that is the right meaning.