The king personifies the player himself and symbolically controls other figures, the game as a whole. As historically, he loses and leaves the throne if his army loses.
Why is the king so weak in chess?
The idea is more complex than that. On an ancient/medieval battlefield, orders would be relayed visually, since voices couldn't be heard over the clamor of battle. If the "king" (army commander) had to move from one end of the battlefield to another, the whole army would likely collapse and take flight, believing their commander to have been routed.
That's why the king only moves one space.
+1
There is a king of Checkers - he was once a pawn - so he's agile - slashing through the whole board.
But a Chess king, he was Born a king - so he's spoiled, therefore slow.
if the king never fought till the end then what would it even be? it would just be forgotten and discarded along with its own army that fought to keep it safe at all costs for a better dream