But nothing in the real world ever works perfectly. And past experience with giving governments power indicates that, before giving the government any power, you should imagine it being exercised by your worst enemy.

I hear you. You won’t see me campaigning against gun ownership.

In the kind of world you are excited about, as far as I can see, it wouldn't matter whether you or I campaigned against (or for) gun ownership, because we wouldn't be the ones deciding about it. The government would be, based on its assessment of whether guns need to be banned in order to weed out bad actors.