Luo Zheng was well aware of the story of the fisherman and the snake, and naturally wouldn't make such a low-level mistake. The Iga ninjas were detestable, but they loyally guarded the Emperor and protected the country. For this nation, the Iga ninjas were warriors and heroes. Once the Kaga ninjas came to power, they would also guard the country and fight for its interests. By then, it would be inevitable to have conflicts with Huaxia Country, becoming a new ninja threat.
Driving out the Iga ninjas and bringing in the Kaga ninjas—if it doesn't benefit the country, why bother? If the snake harms the fisherman after recovery, the best solution is to eliminate the snake as well. Even if that's not possible, let the Iga and Kaga fight until both are badly damaged, unable to threaten Huaxia Country for decades. As for the future, that should be left to the successors to handle.
