Why is “nibbling around the edges” a problem?
It’s not a problem per se, as long as the reg is very specific to firearms. For example, permitting the firearms manufacturers to be held liable would be a precedent that goes far beyond firearms alone. Not good. Obviously, a law that mandated trigger locks is a different matter, because of the specificity; such a law has no problems.
Politically, the problem is with politicians that propose “nibble along the edges” policies whilst pretending that they are silver bullets that solve the problem. If you’re an anti-gun politician who wants to see European style controls in the US, then have the cojones to float an Amendment repealing the 2nd. Put another way, unless you’ve floated an Amendment to repeal the 2nd, stop blaming the “gun lobby” and the NRA for gun deaths. That’s faulty reasoning floated for political advantage only.