Things I do worry about once I've completed a quilt:
Someone using bleach on it.
Tears.
Stains that can't be removed that were beyond my control.
Burns.
I've also come across pulled out seams - reasons for that were: skimpy seam allowance - fabric that frayed easily - unsuitable fabric such as flimsy polyester or satin - repairing them is a lot more work than avoiding them in the first place.
I don't like to fix things or do things over.
When I see posts with a question about how to fix an item where the seams are coming apart, or the other fabrics have been stained by a fabric bleeding, or the item won't lay flat, or how to straighten a panel that was printed off-grain - experience is a great teacher - but why not take someone else's word for how to avoid some of those situations when they've been there, done that?