How come PDCs never miss?

[Neo]

I've been reading some past threads, and people have been saying that missiles have become increasingly useless since the newer AIs all have plenty of point defense cannons. Perhaps a fix for this would be to make PDC have a chance to miss, just like all the other guns do. After all they are shooting against smaller, faster moving targets, which should be hard to hit. The chance to hit would have to not be based on range like other guns, or else you couldn't keep the firing of PDC automatic instead of manual, and in actuality it really should be harder to hit fast moving missiles when they are closer to you than when they are farther away. And it should be harder to hit missiles the faster they move as well. This would make fighters more viable too, because I think they are too easy to defend against with PDCs as well.