The tagline for the article, "That's a fact" is ridiculous........consensus doesn't determine facts, and this is a far less commanding consensus then on say, evolution or the Earth being older than 6000 years old.
Also, since the thesis was guns make society LESS SAFE, not less safe vs more safe, the "consensuses" are 72-28, 64-36, 73 vs 27, 62 vs 38, and 71 vs 29. These are hardly unanimous verdicts.
It's a poll. It might not even be 'scientific' if the people polled are scientists. But that suggests a landslide. For real protection, get a dog; few criminals want to face some of the most brutal fangs in the animal world.
On the other side, having and using a swimming pool is one way to get excellent exercise that might lengthen one's life expectancy. You keep the pool behind lock and key; you make sure that anyone who brings small children to the pool watches them; above all you do not allow drunks at the pool. Of adults who drown in swimming pools, I can only imagine what percentage are drunk at the time.
Without reading the site -- some people have had circumstances in which a gun stopped a horrible crime. On the other hand people have
(1) shot the wrong person
(2) misinterpreted a situation as life-and-death when it wasn't
(3) been too hesitant to fire
(4) been overpowered for the gun
(5) committed suicide with a gun