Yes, Nick Collins scored 5 or something like that on the Wonderlic, and he didn't do too bad on the football field.
But just cos Janis is raw and makes a few mental mistakes doesn't mean he can't play. Pretty sure Adams and Nelson made a tons of them too in their first few seasons. And Janis has speed, something that can't be taught, or so the saying goes. When the guys you're playing are as slow as sloths, it doesn't hurt to add some speed.
As I stated previously, the coaches should've played Janis over Allison, a slothish JAG. Players like Allison are a dime a dozen. Janis has speed, and when he's on the field with the rock, good things usually happen.