This kind of technology is far too useful to repressive regimes and those who wish to do nasty things with it.
This means that the incentive to develop this technology is already there, and so it WILL be developed no matter how much people wish it wouldn't.
The only difference at this point is whether some of the implementations are developed in public view or not. If none are public, then all of them will be done in secret, and our opportunities to develop countermeasures will be severely hampered by having fewer eyes on it, and a smaller entry funnel for potential white hats.
In the case that they're blocked: They'd only need one unrestricted computer to pull their libraries into & subsequently copy that onto siloed off workstations. It's not like anyone will actually care to notice.
In the case that they aren't blocked: Business as usual.
There are many small entities with interest in such a technology which don't have huge budgets. Small terrorist / extremist organizations pushing a specific agenda.
Countries like China can no doubt develop this independently, but they are unlikely to share the technology with random extremists.
This means that the incentive to develop this technology is already there, and so it WILL be developed no matter how much people wish it wouldn't.
The only difference at this point is whether some of the implementations are developed in public view or not. If none are public, then all of them will be done in secret, and our opportunities to develop countermeasures will be severely hampered by having fewer eyes on it, and a smaller entry funnel for potential white hats.