“gun deaths” is a propaganda metric. It is designed to misinform and channel the debate.
To illustrate this, consider “hospital deaths”.
In developed countries, there are millions of hospital deaths. The more hospitals in a country, the more hospital deaths. We must ban hospitals, as that will stop all hospital deaths.
Japan has extreme gun control, and they have a higher rate of suicide than the U.S. Instead of guns, they use subways, knives and cars to kill themselves. The tool used is irrelevant.