Vista - Pixel != Vector

Hey everyone, I've been trying for a few months to grasp the concepts,
but I can't quite get it. How can they replace pixels with vectors?
Doesn't that limit us to basic types of drawings?

I mean, just look at a game like Warcraft 3. They can draw a lightning
bolt with their fancy formulas and functions and whatnot, because they
can do it pixel by pixel. But there is no way they will ever be able to
do that with... vectors.

Why did they take away the options to use just drawing pixels? Why
didn't they leave it as an option?

....is there a way around this? Is there a way to draw with pixels,
instead of vectors?

Thanks for your time,

- E