she makes a Gen 1 printing press and thinks nothing of it..... that is the same tech that revolutionized bookmaking and allowed for businesses such as newspaper companies to become viable. It also accelerated information spread, though it still took a while for that to happen. Honestly sometimes Myne not understanding how amazing what she is doing is frustrates me.
I mean, to be fair, knowing what something is and how to make it doesn't require knowledge of the consequences that thing brought. Certainly Myne had the ability to research the consequences of the printing press, and most certainly
did learn of some of even only through osmosis, but she is so obsessed with books and the idea of books that it's likely
any negative consequence associated with the technology is immediately stricken from her memory or disassociated from their source.
Besides, like most people born after the initial invention of a commonly used thing/idea, it's entirety possible that she is so absolutely used to it that she simply cannot grasp the magnitude of what she has introduced. Even if the knowledge is within her, her absolute desire for books overrides that knowledge and pushes it into the mundane but necessary.
I guess an absurd but comparable situation would be someone from a "world of magic" accidentally transporting themselves to our world (one without magic) and
requiring the infrastructure to exist to be able to return home, so they forcibly introduce magic to our world, turning everything on its head, without a thought of the potential consequences of introducing such a thing. (Imagine that the usage of magic creates monstrous beings that can only be fought using magic, or pollution generated by magic and only able to be cleaned with magic, etc. but they don't mention these things either because they don't know/associate them with magic or as unusual/don't care because they want to get home.)
That's effectively what she's doing, but in a less "fantastical" way...