Because, while Switzerland is not part of the EU, it follows many of its regulations. Maybe even most of them.
In this particular case, I happen to know that the inofficial rule is indeed to have burner phones for travel into the us in some cases. But you’re never supposed to have unencrypted data on your phone or laptop in any case.
That’s like saying Mexico isn’t following EU use of burner phones. The Swiss are not part of the EU, so why are they being compared to them?
Because, while Switzerland is not part of the EU, it follows many of its regulations. Maybe even most of them.
In this particular case, I happen to know that the inofficial rule is indeed to have burner phones for travel into the us in some cases. But you’re never supposed to have unencrypted data on your phone or laptop in any case.