The word “leader” can have a range of meanings depending on the context.

It can mean someone who holds a position of power, and it just defines the position. It can also describe someone who inspires, who points the way, who commands loyalty without asking for it, totally independent of the position held.

Years ago, in a factory I was running, there was a quiet bloke, uneducated, and unassuming, but one who could make or break any initiative management proposed in the factory.  He led, not by position, but simply by the force of his presence, and capacity to engage and inspire the others in the factory. He was a “leader” who led.