The problem here is that these figures given do not address what the rates and trends were before the bans - only looking at after the bans. That can't tell us much.
Switzerland
I looked up such incidents in these nations, by using a common search. I'm not claiming a masters thesis here. Switzerland has had 5 massacres since 1900 (
https://en.wikipedia.org/wiki/List_o...in_Switzerland). One in 1912, 1932 (a police shooting on protestors incident, not really the same thing as we are discussing here as the State is exempted from gun regulations across the world and in every serious proposal I have ever seen), 1976, 2001, and 2015.
So we have had 1 in the 21 years since their 2001 ban you discussed. They had last had one 25 years before the ban. Before that one in 1976, it had really been since 1912 that this happened. We have 4 real incidents, 2 before, the 1 precipitating the ban, and one after the ban. This is a truly tiny sample size, but nothing here suggests that gun control laws have reduced massacres (technically they are up after the ban, but with a sample of 1 that is just as garbage data)
The homicide rate appears to have declined after the ban. It was also declining before the ban though, as it was in most places in the first world during this period.
https://www.macrotrends.net/countrie...-homicide-rate. It does not looks like this reduced the murder rate.
The laser sight provision seems odd to me as a shooter - it is about the least efficient method of target acquisition that exists. Old school iron sights are faster to get on target than a laser in most use cases.
Australia
There's too many in Australia to list every one as I did in Switzerland. 1996 was 26 years ago, so splitting into blocks that size and counting off the list by hand (
https://en.wikipedia.org/wiki/List_o...in_Australia):
1969-1995: 20
1996: 2
1997-2022: 37
It does not seem to me that this ban has reduced massacres whatsoever. Massacres have almost doubled since the ban. I doubt that has anything whatsoever to do with the ban, but the data pretty clearly tells us it has not reduced massacres (or if it has, something else has happened that more than offsets its effect and made things worse).
The overall homicide rate follows the first world global trend, it goes up some years, down some years, but the overall is a downward glide (a very good thing). This glide did not begin with the ban. It's about flat on the whole from 1995-2000 (1998 was a good year, 1999 a bad year). Again, the data does not suggest that this ban saved lives.
https://www.macrotrends.net/countrie...-homicide-rate