I know one person -- maybe two -- who could probably add a stitch in each of 17 knitted rows. But I can't imagine that either of them would, and I'd have no idea how they did it anyway. Even if I sat and watched them do it.
I'm gonna vote with the majority and say it probably isn't going to make a difference, especially if this is one piece of a larger whole. But even if it did, frogging 17 rows and starting over isn't anyone's idea of fun and merriment, but it's also not the worst thing that could happen.