Also, this is only one last straw in a long string of harassment tactics, those on their own should be enough to be sent to jail in my opinion. Releasing public information, tricking cash on delivery to the person's address, making false reporting of child abuse to security services about the person, coordinating to have strangers unknowingly perform home invasion at their house, etc.
There might be something to be said about a swat team response, but let's not get distracted by what is a much more common and growing type of crime.
The person who died came outside to greet the police with a gun in hand. The police de-escalated, but they continued to be cautious because they had received a call about a violent gun-related crime in progress.
https://www.newstatesman.com/sci-tech/2015/08/swatting-uk-tr...
Other countries don't have loose guns policies like we do, which means that more incidents will require armed response.