The issue with that is "who will judge craftsmen worthy of receiving this knowledge"? A lot of unique expertise dies because no worhty apprentice could be found and was taught before the waster died. Would said Master trust their inferior successors to pick a worthy recipient for these techniques if the Master already judged his colleagues and successors unworthy of it? Of course not!
This gets even worse when you include Guild secrets, religious prohibitions, etc. And of course there's the fact that a lot of this stuff is very hard to put in writing and much easier to teach directly.
I'd guess that individual guilds already do this to some extent, but that pushing things further will be a stretch.
To give an idea of the problem and challenge and seriousness involved with these things, with writing down
all the secret and sometimes divine or sacred knowledge of millennia, let's use an example ourselves:
What, exactly, would make the posters be willing to write down
absolutely. everything. that Mathilde knows about Magic and being a Wizard and Grey Wizard (and her Divine adventures and knowledge too)? Yes, even including the Secrets of Dhar. Yes, even including the Liber Mortis as a whole. Yes, possibly even including the way and reason she succeeded at Queekish, which required a Ranaldian Divine artifact. No, I don't care that you'd protest that "That shouldn't count!" No, I don't care that "But that's not Ulgu magic!" or "But that's not our secret alone -- that's Van Hal's/Ranald's secret too!"
You wanted people to be able to pass on the capabilities and skills and knowledge that would prevent people from reaching the heights of these craftsmen. You should include
yourself in that assessment.
Once you have tackled the question from
that perspective...
Then you can begin to approach it from the perspective of other people.
Because, like, do you think that you
alone are going to have protestations of "But I only learned this due to swearing an oath of secrecy/privacy/saving an individual's life/etc!" when it comes to sharing knowledge? Or that you alone are going to have "But this would/could literally see me dead, if I shared it" or "This is literally matters of security and national interests here man."
What exactly do you think some of these people's secrets and crafts
are?
Asking them to share everything that would let somebody else become as good as they are... ... Is roughly equivalent to asking Mathilde to share everything that made her, herself. Made her as successful and effective and skilled and acknowledged.
You may have noticed that there's already a mechanism for doing that, actually.
It's called taking apprentices.
That's what people do. And they do that, in part, because they loath letting these things out of their control.
Much like Mathilde would probably not be happy with just relinquishing control and knowledge and secrets over the Liber Mortis and the Coin and Aethyric Vitae to some library, with no idea of who will ultimately be able to gain that knowledge. (And the tests and requirements for "Okay, who can be allowed to be read into
this part of my knowledge?" are probably so involved enough that you might as well cut out the middleman and just start raising an apprentice yourself. Funny how that works out, huh. The most reliable way is to do a thing yourself. The other most reliable way, is to leave it in the hands of people you trust immensely and find very reliable. Which, surprise surprise, an impersonal and person-agnostic thing like
a library would not count as. Because you're asking to trust either library books in perpetuity, or to trust the caretakers and gatekeepers in perpetuity.)