I suspect restricting access could equally be a comment on modern LLMs in general, rather than the historical material specifically. For example, we must be constantly reminded not to give LLMs a level of credibility that their hallucinations would have us believe.
But I'm fascinated by the possibility that somehow resurrecting lost voices might give an unholy agency to minds and their supporting worldviews that are so anachronistic that hearing them speak again might stir long-banished evils. I'm being lyrical for dramatic affect!
I would make one serious point though, that do I have the credentials to express. The conversation may have died down, but there is still a huge question mark over, if not the legality, but certainly the ethics of restricting access to, and profiting from, public domain knowledge. I don't wish to suggest a side to take here, just to point out that the lack of conversation should not be taken to mean that the matter is settled.
