30,000 device searches annually is WAY too many, but it is far more limited than than the system in China. Are you really trying to argue that border searches, no matter how much overreach, is the same as the Chinese Firewall?
It sounds like you're saying the limit infringes on constitutional or human rights, and should be reduced, which I agree with. Your original comment said there wasn't much conceptual difference between the two systems, which I disagree with. Neither system is acceptable, but that doesn't mean they are the same.
Not sure crossing the US border in either direction or being within 100 miles of it (the 'extended border area') is particularly 'limited'?