I think 'never' should be understood in this way—either there's something wrong or fundamentally incomplete about our theories, or we can not know certain things. Barring groundbreaking advancements in understanding akin to quantum physics and relativity theory, physics tells us so. Since the papers discussed do not establish such a new and testable theory but still go and discuss things current science cannot access, they cannot taken to be science. Doesn't necessarily mean they're wrong or uninteresting. I don't think she excludes the possibility that a groundbreaking discovery could be made that changes that. But the papers were not written in a time that knows of such a discovery.
The implication is that we simply don’t have enough energies to recreate similar circumstance in a particle accelerator and we cannot “see” past microwave background radiation. As such, as of now, there isn’t a straight path to understand the Big Bang further in any context.
It's theoretically possible that we'll one day find some other method of finding out the truth (perhaps a god will descend from the heavens and tell us? or perhaps we manage to find a bug / exploit in the simulation?) but personally I find it unlikely.