I’ve never owned a gun and still agree with them. There are certainly people who shouldn’t have guns but the vast majority haven’t yet had an incident to get them taken away by any hypothetical law.
You can’t prevent every gun death. It’s certainly worth preventing the ones we can, but this particular story has no indications that these ladies had previously given cause for taking them away. They were at least seen by the state as responsible enough to foster children.
So to come to this particular story to advocate taking guns away from folks under circumstances that wouldn’t have changed the outcome feels more like grandstanding than conversation.