Blender has support to programmatically generate and manipulate 3d objects.
Of course it could be handy for some users if those programs can be written by a tool that has natural language as input.
And as you pointed out there a plugins doing that.
But I would agree it's obviously ridiculous to think Blender would integrate some third party commercial non-free API into it's core.
You thought in two days they would integrate a commercial plugin that uses a closed commercial API that just generates commands and then put in a major release?
no, but if you watched presentation you mostly fiddling with numerical values for how the hair would be constructed. not a hard stretch to imagine GPT learning how to fiddle with that and create its own characters by - yes - generating text values / numerical values that Blender understand.