They are tricky to use early on, since you will miss oftain and shoot slowly. Later on, as you rank your skills, those problems will be fixed, making archery more viable. When Arrow Revolver comes out, archery will become very abusively powerful.
Note, by the way, that going ABSOLETLY PURE on anything in not smart. Plan on having Counter, Defense, and Windmill at Rank F to suppliment your attacks. Also plan on having an alternative melee weapon as well (note that even archer monsters are willing to drop their bows when needed).

Ever felt like this some days?