My feeling is that I make quilts for myself (and I know how to take care of them) and for my grand kids. The kids quilts will get more use, more laundering and will probably wear out from love ... fine with me. Why spend big $ on that.
Now if I were to make a 'heritage' quilt or one for competition I might reconsider buying the best fabric available.
Of course I still make sure the fabric isn't thin or see-thru, and decent quality. I don't like 'crunchy' fabric that has way too much sizing, that is a sign to run away fast.