You're conflating the October 1929 stock market crash with the Great Depression. They happened around the same time and they're related but they're not the same

You're conflating the October 1929 stock market crash with the Great Depression. They happened around the same time and they're related but they're not the same thing. The 1987 and 2001 stock market crashes didn't cause decade-long depressions, and the 1987 crash was a larger drop than 1929. One-day crashes make headlines but aren't that damaging to the underlying economy unless it's already very brittle.