The current prime minister of Israel since June 13, 2021 is Naftali Bennett. He is 49. Former PM was 71. Will someone younger be/do better?

Israel is a Republic. The President of Israel is the Head of State.

HOWEVER

The PRIME MINISTER HOLDS THE EXECUTIVE POWER


What's the point of having two "heads"? America is a Republic. We have a President. No Prime Minister.

So what kind of Republic is Israel that it has two heads?