No. Just libertarian nonsense, ending the gold standard ended the Great Depression. 1971 marked the total abandonment of it but it was over in practice in the 30's.

Edit: Not that I'm anything close to an expert, and despite that line I tend consider the idea that inflation is good to be class warfare, but that date is a correlation, not a cause.

What actually happened in the early 70's was the Vietnam War and the rise of neoliberalism, until it seized the reins of power with Carter and Reagan.

And, yes, Carter was the start of the decline. Reagan actually had quite a few policy overlaps with him, he just hated brown people, unions, and commies a lot more. Carter might have meant well, and he's certainly got less blood on his hands than most Presidents, but the path was set regardless.

I think there's probably a pretty good argument that that final abandonment of gold sealed the doom of economic neoliberalism and modern monetary policy, but the reality is the people who push that idea are generally trying to sell you crypto and silver.