When a person asks, 'should I fix it,' they're asking for another person's point of view. When there are lots of 'I wouldn't's, I assume it means the people replying don't find it to be a glaring flaw. We all have different standards.
As to why people ask this, I asked once. It was a border issue, and I didn't have the knowledge at the time I made the quilt, to do it right. I also did not have more of the fabric needed to fix it. I genuinely wanted to know how other people saw it -- if they felt it aesthetically ruined the quilt, or if they didn't find it terribly noticeable. I know it will still bother me when the time comes to quilt it, so I'll probably think of a way to deal with it at that time. But I did feel better after hearing all of the comments from those who didn't think it ruined the quilt.