There is a lack of aggressive monsters at that starter area's I agree, but I think this intentionally done.

Many of the dungeons like Tam-Tara, Mistbeard and Copperbell all have aggressive monsters and narrow pathing.

Getting to Broken Water with all those Buzzards and Mitelings is kind of tough aswell, especially if you are lower level.

So yea there are places that do have aggressive monsters they just aren't around the starting area's.