I appreciate that position and I do understand that there are people who legitimately have a need for a firearm, especially in rural area's, and that there are plenty of responsible gun owners.
Zero ownership wouldn't even have to be implemented, just very strict access and stringent control and 100% traceability, thereby severely limiting the possibility of any weapon ending up where it shouldn't.
Currently none of those measures have been implemented or only half-arsed and the likelihood of legal weapons ending up on the black market is just too big, especially when you consider the sheer amount of arms in circulation. That's the problem that should be addressed.