NASA, why are you so very stupid?

So, they're going to stick astronaut Stephen Robinson on the end of the shuttle's 18 meter robotic arm. Then they're going to gently move him so he's down around near the shuttle's belly. Then, he'll examine the material sticking out of the bottom of the shuttle. He'll try to tug on it. If that doesn't work, he'll use forceps. If that doesn't work, he'll use an improvised hacksaw. The Globe & Mail says the saw is made out of "a blade, plastic ties, duct tape, Velcro and other items."

Maybe it's just me, but why in the name of sweet Christ isn't there a regular, non-improvised hacksaw somewhere up there, either on the shuttle or on the station? Space exploration is a risky business, and the machines we use to do it sure seem to break down a lot. Given all that, maybe bringing up a tool kit might not be such a bad idea. Maybe some space-screwdrivers, some galactic vise-grips, an astro-saw, some orbital duct tape, that kind of thing. Does that seem reasonable, or is there some part of this I'm missing? Our astronauts were strapped when they landed on the moon, so why not take a tool kit with them up to orbit?