I've had days like that, where I spend more time ripping seams than I do sewing. And if I weren't selling the quilt to someone for a significant amount of money, or giving it to someone important to me, or planning to have it scrutinized by show judges, I'd probably let it go.
I walk by a wall hanging every day that has one open seam (because I didn't lay it out right when I was paper piecing), and it reminds me why it's worth fixing during construction.