Would you as an organization with intellectual property and publicly known IP addresses want to pull development code through a national firewall that certainly monitors Internet activity (including IP addresses) in a country known for stealing IP?
If not, where are you going to get development code for 5G technology?
I'm not saying there is much in the way of such development code; this is not the focus of the discussion. But, such things should be thought through.
This is one perspective that speaks to the scope of the discussion, in an industry and standards boards called for by governments that doesn't always think things through. That is, there's a broader context to be considered. Sometimes people just don't know what they're asking for.