You can delay your own publication as long as you wish to. Bullying somebody else to delay theirs is a different thing entirely.
If the advisory group says something like "AI is bad and nobody should use it in math", I'm pretty confident OpenAI will ignore them.
On N-S I think nobody internally felt confident enough to publicly step up. So Bubeck had to wing it.
It remains to be seen which of the big names will work with whom inside the org