Leadership is not about being a superhero - most superheroes work alone. It is about empowering and envisioning others.
Leadership becomes ESSENTIAL as you progress through your career as you realise that your personal output is finite, but by motivating and influencing others towards a shared vision your impact can be infinite. No-one achieves a great legacy on their own.
There are many definitions of leadership, but here is my own take on it.
Tried to keep it short and snappy, but here's more on my thoughts about leadership if you fancy reading on: