Just as I was about to take comfort in knowing that so many others live with a seam ripper in their hands or at least the proximity, I learn that one person doesn't need one and another doesn't lose hers! WOW!
The friend with whom I often sew is a perfectionist who rips out any seam that offends in any way. For me, if it holds together and the flaw can't be seen from a galloping horse, it's good enough. But I still need a seam ripper, although I really prefer a single edged razor blade.!