Six months before Kiko Martinez won the IBF super bantamweight title, he was stopped in nine rounds by Carl Frampton. Martinez is a strong fighter who makes bouts entertaining, but he's limited.
He's got a belt, but he's arguably not even top-five in his division.
There are so many "world championship" belts floating around in this era of alphabet soup, it shouldn't be surprising that a lot of the title holders are vulnerable.
Incidentally, I haven't even tried to evaluate the various interim champions in this article. They are recognized and withdrawn without rhyme or reason and barely worth taking note of, most of the time.