It doesn't mean this is the only thing they're working on. Nevertheless it is a fact that they're not working on solving the underlying problem. They are working on marginally better traps that don't actually reduce the population effectively.

https://www.nytimes.com/2019/09/05/nyregion/rats-new-york.ht...

> “New Yorkers need to understand that they have a role in stopping this,” said [Professor Munshi-South of Fordham University Department of Biological Sciences]. “I don’t believe we have built in a right culture of how to dispose of our garbage. People have not made the connection between what your neighbors are doing with their garbage, and how this feeds the problem.”