Goblins aren't that scary. They really aren't. I mean even Flumphs give them a run for their money. Large rats probably beat them up for their lunch money. They only threaten other species if they have significant (ie minimum of 5 to 1) numeric advantages. Bugbears toss them around and orcs occasionally give them to their young as chew toys. No wonder they're the mooks of the D&D world.