Taking your shark tank metaphor, some people believe it‘s simply not possible to remove guns from a society, which is untrue as well, as the recent example of Australia shows.
Heck, lots of people in Germany used to have a gun in WW2, while in 2011, German police shot a whole of 85 bullets in total. Which, incidentally, is exactly one bullet less than Texan police emptied into a single, unarmed suspect after a car chase in the same year. Well, you get what you vote for.