I, for one, think you should have said "I like the challenge of working with bias. It shows my skill level that I can accomplish this! Don't all good quilters do it this way?" Whatever it takes to shut the quilting police up! They don't realize that this is to be a pleasure, not a test, or perhaps they are afraid they might be one upped so they try to be superior. I love to teach my friends and the first thing I tell them is to do whatever works FOR THEM. It may not be the way I would do it but that doesn't mean it is wrong!