There's a certain forgiveness in forks due to the redundancy. I'd probably give it a go at straightening, and if it went well, I'd ride the fork. But not forever, consider it a short term deal while you seek out a replacement.

In all honesty, I wouldn't expect a catastrophic failure because it's only one of two blades, but when I'd descending a grade at 40mph, I don't want to worry about what's between the road and me. I'm that way about stuff in general. If I drop the front wheel into a deep pothole (the kind that instantly scrubs about 5mph of my speed) I don't want to then worry about what it might have done to the fork.

Same exact situation on the rear dropout and I'd fix it and forget it and ride it as if it were new for years.