This idea of perfection put me off quilting for years. I've recently restarted and gone back to the basics and more importantly I don't stress if something doesn't line up perfectly, unless it's miles out. Makes for a much more enjoyable experience, plus I'm actually finishing quilts as opposed to having them laying about trying to make them "perfect".
My local village quilt group is obsessed with perfection and you get a negative comment for anything that doesn't match precisely, needless to say I don't go anymore which is a shame because they are all excellent baker's, but my waistline appreciates it more.