I'm sure if it were to happen to me, I'd feel similar to the citizen posting this on Twitter, especially if they felt it was unjust and weren't expecting it.
However, from a police procedural point-of-view:
When the subject(s) perceive a threat, it only takes a small amount of time for the adrenaline rush that could make them more dangerous than they typically would be.
Subject(s) that would never usually be a threat can act in ways they don't even expect when they are confronted by something they perceive as a threat.
Even if the first subject is calm, one of the others in the house might react poorly and use whatever is at their disposal to resist or harm the perceived threat.
Let's say instead that a single plain-clothes officer calls or emails asking someone to come downtown, or maybe even comes to a house unexpectedly because they couldn't get in-touch with the person, then asks them to come downtown at their convenience. The subject may shortly after throw the kids in the car and speed off so quickly they run into traffic and kill themselves and another driver. So, when police control the situation, they cause a little more temporary stress in the short-term, but may avoid harm for the individual citizen and the rest of the citizens.
The alternative is a society within which each person acts responsibly on their own, but there are bad actors, and using science to treat or evolve bad actors is:
1. imagined as evil, such as in the fictional works:
Brave New World - example of dual-society, half utilitarian scientist gangbangers and the other half free natives; the reader understands the "evolved" culture as disgusting, scary, and harmful.
A Clockwork Orange - attempt to rehabilitate the psychopath, sex-addict subject, but due to the music choice, the psychopath becomes hurt when they play the music, leaving them where they started- with a psychopath.
2. actually evil in real life, for example: psychological and Eugenics experiments, as well as genocides and holocaust.
In social media bubbles, psychotic elements in the bubble tend to be hushed or hidden; they seem not to exist. In real-life, about 1 in 10 people are not sufficiently altruistic to be trusted to act on societal best interests under duress and about 1 in 100 people are psychopathic to the point of being a greater risk to others on any day of the year.
Even for a fully libertarian society to function, some part of the 90% would have to cover for the 10% and some portion of the 99% would have to cover for that 1% to make things run smoothly. So, we have police. And, if you add wild animals and wide open spaces without assistance into the mix, you understand why the U.S. has the 2nd amendment, and that applies to everywhere because it's meant to cover all cases and likely futures (if disaster happens and infrastructure collapses, we may need to hunt to survive, given the amount of space in the U.S.).
But, I don't want gun violence, and I don't want citizens to be unjustly apprehended.