Welcome from E Pa. it is a matter of preference just like washing fabric before using it. I like to starch twice. I don't do it till I need it.
Fabric feels like an index card and can be handled without stretching or distortion. Bias edges are no problem.
I wash my quilts after the binding is finished.
I think different quilts require different methods. Gather all the info you can and pick and choose as you need to with each quilt.
peace