I worked with a group doing charity sewing, a small percentage of the articles that were done by volunteers were very poorly made, almost always by an elerly person who put her heart in it and just wanted to still be useful. I had to distance from the group because a leader wanted to lecture these women. I tried to explain to the leader it would be best to just accept that a small percentage would be a loss & not usable and not worth causing the poor sewer embarrassesment and hurt.
Remember these are volunteers, sewing from their heart, they are often elderly with their eyesight & health failing, they deserve to be respected, if what they sew is not usable then so be it.