I agree.
The biggest beef I have is when people say they have to use 100% cotton. Our ancestors used what they had. This means I may need to use 50/50 to fill in a color since I don't have much all cotton to choose from here. I don't worry about the "quilt police". I realize that all cotton is nicer, but the 50/50 works.
Also sometimes, since I use used clothing...I don't always know what the material is if the tags are cut out or the thing is home made.