FP64 performance is limited on consumer because the US government deems it important to nuclear weapons research.
Past a certain threshold of FP64 throughput, your chip goes in a separate category and is subject to more regulation about who you can sell to and know-your-customer. FP32 does not matter for this threshold.
Past a certain threshold of FP64 throughput, your chip goes in a separate category and is subject to more regulation about who you can sell to and know-your-customer. FP32 does not matter for this threshold.
https://en.wikipedia.org/wiki/Adjusted_Peak_Performance
It is not a market segmentation tactic and has been around since 2006. It's part of the mind-numbing annual export control training I get to take.