Why are Gnomes so small?

I think Gnomes are happy just the way they are. Plus they already know their brains work better than most so they have no need to change.

Q u o t e:
I declare bull on this statement.

Okay, then tell me which of these sounds better.

A giant creature smashes sword into other giant creature.

or

The small yet powerful and creative gnome has once again defied all odds and dodged all dangerous blows to take down yet another giant creature.

I'll give you a hint, it isn't the first one.