It's like putting up a speed limit sign that says "55mph" and then ticketing them for speeding going "53mph"
It's much less like the speed limit example you gave and much more like a parent telling one of their children to stop touching the sibling so they just hover an inch away from them saying, "I'm not touching you!". The parent is going to very obviously modify their rule immediately to curb this circumvention.
If I had to guess, Nvidia hoped the regulations were just signalling rather than an actual attempt to prevent the specific hardware from getting to the Chinese.
What they actually said (abbreviated) was anything with more then
> "600 Gbyte/s [memory transfer speed]" or 4800TOPS
Page 103 https://public-inspection.federalregister.gov/2022-21658.pdf
They set very specific performance restrictions, not a general "don't sell fast stuff plz"