Deserve?...really?...you realize them biting humans is not normal and is a mistake for most shark species, right?
It's statistically impossible and short sighted to conclude that discouraging the practice of slicing fins off and letting millions of sharks swim away to an unnatural death, leads to an increase in shark attacks.
Paying up to $100 for a bowl of soup is a study in strange human behavior, just like a dozen other expensive thrill fetish exotic eating experiences that are becoming popular for rich food weirdos, no different anymore than ground rhino horn as an aphrodisiac.
The Jersey shore attacks of the summer of 1916 were a statistical spike (four deaths, five attacks) just like what is being experienced off Maui at this point.
Conclusions cannot be made by sighting a statistically short spike like this.
Your's is an emotional reaction which is understandable, but that historically leads to poor decisions about animal control.
I think politicians can contribute to effecting tourism (positive and negative) in Hawaii in a multitude of ways, banning the practice of finning sharks is probably well down the list.