decrypt traffic
drop traffic that can’t be decrypted.
This would be an absolute fucking disaster for myriad reasons both technical and practical. Any politician who earnestly suggests it as any sort of solution 100% has no idea what they're talking about and should not be taken seriously.
Yes, politicians talk about trying to do something like that, but the reality is that it would destroy security for businesses, institutions, and even the government itself. Encryption and VPNs are crucial to just about any modern business of even moderate size.
Those also companies use VPNs when they transmit, bring burner devices, and take other countermeasures to try protect their data from theft.
Additionally, there are plenty of people who are citizens there and still get around their firewall.
Actually getting rid of encryption or making it ineffective would be a disaster: IP theft, identity theft, and all sorts of other problems would greatly intensify without it.