When I first began quilting, I had a perfectionist friend. She made me unsew a few times. But, she did not make me feel like a doof. She really helped me do a better job for the more complicated blocks. I am super-critical enough of my own work anyway. My husband keeps reminding me..."it's only a quilt, it is made to be used and enjoyed. No one will be as critical of your work as you are! Relax and enjoy it." He is right! So tell your friend to RELAX. She will discover why she needs to be more careful of her seams as she continues to sew.