All that said, Bretton Woods matters because people look at the gold standard as a time when wages in the United States rose. Like that's why Bernie Bros on HN care. It's the same reason they oppose globalization: me me me. So it's worth knowing why it was flawed. They don't comprehend that before and after Bretton Woods, hourly wage charts measured a fundamentally different thing.
I think it's better to attack the charts - I mean, you're responding to a Charts Guy, a guy who's like, look at this Gold Denominated Chart guy - because that's what their brains work on. Don't worry about economics. These guys are not economists. They are Charts. The real attack on their worldview is that, well, just because the year in the X axis is an increasing, doesn't mean that you can compare a bigger year to a smaller year. They would really like the world to be ordered that way, but it's not, and taking leadership on convincing them of that is very hard.