The gun show loophole is a well known phenomenon. You can find numerous explanations and discussion via the Google, but here are a few:
The stated goal of closing the loophole is just an attempt to require all gun sales to go through the same NICS background check that licensed dealers already conduct for every purchase. For responsible gun owners who aren’t convicted felons, mentally ill, or convicted of a domestic violence offense, it creates no additional obstacle.
The NRA used to support universal background checks as a responsible step toward gun safety that didn’t prohibit what are now already legal sales. But since they’re now more of a lobbying group for gun manufacturers than an advocate for actual citizen gun owners, they are fighting it vehemently with slippery-slope fallacies and factual misinformation.
Thanks for asking! I assume you yourself are not a felon, nut, or spouse-beater, so hopefully you can responsibly enjoy all the guns you care to own while still supporting the idea that maniacs and criminals shouldn’t be able to get them easily and legally.