The point isn't that there are no culture war issues that matter - for example I'm pro choice and pretty disturbed by recent right wing activity on that front
It's that the culture war is basically unwinnable and if people fixate on that to the exclusion of economic issues, everyone but Blackrock and Goldman Sachs will end up owning nothing.
Blackrock is laughing its way to the bank every time you start a flame war with some imaginary bigot. Classical Marxists, classical liberals, hell classical conservatives have actually been making this point for years and they've all been called bigots for it