Ignoring the registry??

Is it normal for ppl to just ignore your registry? My baby shower is next weekend and nobody coming has bought anything from it. This is my first baby and told to put off buying a lot of stuff until after the shower, but it's making me so anxious. I feel so ill prepared. I also heard that a lot of ppl ignore registrys. I don't understand why? Is there a reason?
Side note: I have lots of inexpensive things on there like pacifiers, crib sheets baby mittens. The regristry is on Amazon bc we thought it was the most user friendly.
Edit: If you can't be nice on this post don't bother responding. You can express your view without name calling. This post was meant to inquire and understand. We are all grown women here.