The behavior enables you to manage HP more easily, especially the use of triggers allows for decoupling logic much better.
This behavior is designed to solve the very basic use case and would need to be extended via events depending on your use case. (behavior scripting interface included)
If you are looking for a much more involved solution you might want to look at this alternative by "ForConstruct" (paid) construct.net/en/game-assets/addons/health-2694