It explicitly does not. It means there are additional barriers to doing it - people would need to accept a bad cert (we already know the overwhelming majority will), or they would need to slip in their own CA that allows them to generate their own valid certs for MITM, but that is eminently doable for the Chinese government inside of China. They can then block all traffic for people that do not use the cert that allows them to decrypt said traffic. It functionally is the exact same thing, and would still allow "legitimate" traffic without problem.

I thought countries who did this already issued their own certs to be able to analyze traffic. Like China. Maybe I misunderstood.