Hamas itself is still far from being destroyed or dismantled. Itās been significantly depleted & degraded, but itās been also rapidly rebuilding, regrouping & recruiting thousands of Esnad (backup) forces.
Killing Sinwar is unlikely to moderate Hamasā demand for ending the war in return for releasing the hostages (including full IDF withdrawal from Gaza).
The would become more insistent on that now.
There are still several top shadow Hamas leaders in Gaza & many middle level or senior ones to take over & fill the void.
Also, operationally, Sinwar wasnāt supervising the fighting & directing combatant movements & tactics. Hamas now fights through guerrilla warfare, hit & run attacks & ambushes; it doesnāt need central leadership or chain of command; their militants act autonomously as they see fit.
The only logical thing to do now is to end the war; since Hamas lost the victory image of Sinwar rising from between the rubble, & Netanyahu got the āvictory imageā heās been so desperate for of killing the mastermind of Oct 7.
Anything else is pointless