"but it is not regarded as unethical in general."

Yes it is.

Maybe you live in an interesting developing nation?

Robbing banks, stores, anyone - is considered basically immoral in all of civilization, thankfully.

Yes - not all bank robbers are psychopaths - probably not the majority.

But prisons are fully of people bending reality to justify their crimes.

Robbing average Joe is universally considered wrong. Robbing bankers, insurance companies or other powerful subjects, I don't think so. It depends on the circumstances - for a good example, see the movie, that is, if you like such a mental challenge.

Robbing banks, bankers, insurance companies and other 'powerful people or companies' is wrong, basically universally.

There is no ned to see any film about this.

>Robbing a bank is universally illegal, but it is not regarded as unethical in general

Erm, no, it is regarded as unethical by almost everyone except bank robbers.

Have you heard of the Robin Hood legend? It says the man was robbing the rich, and was very popular with the populace. I find it hard to believe that his robbing activity was regarded as 'unethical' by 'almost everyone'. Or a recent example, the sci-hub and libgen projects. They are robbing publisher shareholders of their profits. Do you think those projects are regarded as unethical by 'almost everyone'?