I am your age and agree with you.
BUT
That is not really the point.
Remember the old ‘camels nose under the tent’ or the frog in boiling water OR the WWII gem (many versions, but the gist is there)
First they came for the Socialists, and I did not speak out—
Because I was not a Socialist.
Then they came for the Trade Unionists, and I did not speak out—
Because I was not a Trade Unionist.
Then they came for the Jews, and I did not speak out—
Because I was not a Jew.
Then they came for me—and there was no one left to speak for me.
Martin Neimoller
Logically your point is valid. But in the real world of USA, it will be impossible what you are afraid of.
Why??
Because Since December 1791, when 2nd Amendment was enacted, USA is the unique country where civilians could buy firearms. Over 227 years of arming ourselves there are estimated 350-400 Million guns in hands of civilians. Heck we can’t even find the 10 Most Wanted criminals easily, how in the heck are the authorities going to find 350 million guns? Majority of those guns are UNregistered.
It will be far easier to find 11 million illegals than confiscating 350 Million guns.
So, here is what I expect will be enacted in to law. The congress will pass restrictions on SALE of guns with large magazines and raid fire capability.
Finally, no one has ever explained to me how any guns in possession of law breakers will be turned in no matter what laws are passed. Duh...law breakers do not abide by laws!