I actually feel this way about attacks on employment in general, so I'll try to give some quick context about the belief.
I grew up in a lower-middle-class household. We declared bankruptcy once when I was young, and I was told to prepare to have "strangers come and take away furniture" (which, thankfully, never materialized). I never went hungry, but we did live paycheck-to-paycheck and frequently relied on the charity of our extended family to make ends meet. In short, money stress was a thing, and it was obvious from a very young age.
So I consider an attack on someone's employment to be a very serious road to go down because:
- Most people don't have savings, and it isn't necessarily their fault.
- Not everyone has a support structure, we were immensely lucky to have wealthy and generous relatives.
- 4 weeks of unemployment is plenty of time for bills to pile up if someone doesn't have savings, I've taken longer than 4 weeks to find a job every time I've looked.
- COBRA is insanely expensive and may be required if, for example, a close relative is very sick. Fighting with an insurance company as an individual is immensely difficult and interrupting someone's care to have that fight can be life-threatening.
- Desperation breeds poor decision making. That individual may take a pay cut or change careers and never recover.
- The various social consequences of being fired can make finding a job extra difficult.
Basically, I've seen my own family one fail-safe away from disaster, so its easy to imagine the bottom. In fact, that money stress from my childhood has haunted me as an adult -- even though I've never needed to worry about it from a factual standpoint.
I don't have any of these concerns if the individual is obviously wealthy, and I wouldn't go so far as to say one should never try to have anyone fired. But I do personally believe the bar to do so is very high.
Note: I'm not interested in convincing anyone of my point of view. Just giving context for why people think like this.