"Its a very common rhetorical technique to argue that the status quo cannot be changed."
Thank you for putting this so eloquently into words. This rigid thinking is also common in topics such as working conditions, collective bargaining, on-call time, parental leave, healthcare, and effectively (unintentionally or not) shuts down conversation.
I've come to realize the objections from people who think this way all effectively boil down to 'Be grateful for what you have because any alternative would be worse.' But if you pry and ask that they expand you'll find there really isn't any there there, because it's black and white thinking. It isn't rooted in fact, it comes from fear. I sure hope we haven't collectively forgot how to even imagine a system that functions better than the one we have today.
With respect to the need/impossibility of change, the "Politician's Fallacy" seems related:
1. Something must be done.
2. This is something.
3. Therefore this must be done!