Why are PrimeFaces components so big ?!

When you create a PrimeFaces application, all components seems to be, somehow, ... too big ?! I mean checkout this screenshot:

The reason that everything is so big relies in this snippet of default CSS code:

Knowing that you can simply override ui-widget class and obtain a cool look. For example, I've done this:

.ui-widget {

 font-family: Rockwell, 'Courier Bold', Courier, Georgia, Times, 'Times New Roman', serif;

 font-size: 12px;

 font-style: normal;

 font-variant: normal;

 font-weight: 400;

 line-height: 20px;

}

And now everything look better:

Nice!