Earlier quoted context omitted.
Not all US credit card companies are like this. I specifically remember a few years ago that my Mom got a call from AMEX about some fraud on her card, to which she responded “I never get calls from you, how do I know this is real?”. They said no problem, just hang up and call the number on the back of your card. I believe some banks even skip the call entirely, and just prompt you to call the number on the card.
On traditional landline phones that older folk tend to use (although I guess that's dwindling every year) a common tactic for scammers is to ask the victim to call the number on the back of the card. However the scammers don't hang up they just play a fake dial tone so the victim dials the number thinking they're contacting their bank but they're actually just speaking to the scammers again
In the Netherlands, in the 80s-00s at least, hanging up cleared your line, so picking it up again would get you a fresh dialtone even if the other side didn't hang up (and the other side would get a modified "busy" signal if you hung up on them).