Because the handset ended up in a “cradle”, there was almost always contact between the handset and the cradle before the switch cut off the phone. That was true even when someone was hanging up normally. There was a bit of a rattle as the phone went into the cradle. When someone slammed the phone down, that contact between the handset and cradle was much louder, but was cut off much more quickly. It wasn’t painfully loud, but the person on the other end was very aware that the phone had been slammed.
If you were a kid in the 90s, sure. Your parents shielded you from all the chaos.
The 90s also had terrorism (IRA, WTC bombing, German and French hijackings, Israeli settler massacre, sarin gas attack in Japan, Oklahoma City bombing, bombings of US service members in Saudi Arabia, PKK suicide bombers in Turkey, Dagestan bombing in Russia (possibly a Putin-orchestrated false flag)). It had the ongoing AIDS epidemic, which was terrifying. It had the first Gulf war. It had the LA riots of 1992. It had the columbine shooting.