Oh, I'm sure your quilt won't fall apart.
But they might have been talking about an older quilt. Or let's say some fabric ran after it was washed. Or an appliqued piece fell off. Or a previously unnoticed seam had opened. Or a block was placed upside down and no one noticed until after it was quilted.
They can be fixed. Not saying it would be fun. But the quilting in the area could be unpicked, the block put in the right way, and then the area requilted.
The applique piece could be easily reattached more securely.
The seam could be stitched together, or if a hole was discovered, then a piece appliqued over it.
So there are solutions. And I'm sure somewhere in your quilt making journey, you're going to be faced with one of the above situations. Don't panic. There is always a solution.
I'll bet you can't wait to get your first quilt back. I remember being so antsy and excited. I hope you post pictures!