That’s just brilliant! You ought to run for president. /s
"Keeping records" of background checks would eventually provide a database of every person who has purchased a firearm since the law passed.
This is a de facto registry of firearm owners, only excluding those who bought no new firearms.
In the event that someone gets a bill (or amendment to another bill) through requiring private sales to go through a dealer and be subject to NICS clearance, within a generation, virtually every legally transferred (owned) firearm would be in the registry, and a very high fraction of legal firearm owners.
The enemies of this Republic have been patient when impatience would not work, and this would lay all the necessary groundwork for seizure of firearms in the future, much as registration under the Weimar Republic laid the groundwork for the seizure of firearms by the Nazis--the records survived to be used against firearm owners.
With other developments in this administration, I would never trust the Government with such a database, not now, nor in the future. Not ever.
We have seen how well-intentioned programs have been sold to the American People under one guise or another, and then used to harm our Country, our culture, and our society.
Judge this not by the good it might do in the right hands, but the harm it will do in the wrong ones.
I hope you don’t, if you don’t understand that “moderate” incursions on our right to keep and bear arms are dangerous in the same way that radical incursions are.