...Learning magic is hard and real magical texts are rarely available...
...And that assumes you can easily exclude the books on magic that are basically garbage or poorly written or traps by dark creatures.
This last is important and true. In fact, as we saw in
Dead Beat, valid magical texts
are out there. For ex, in Bock's bookstore Harry ran across a copy of
Elementary Magic, an introductory magic text written by Ebenezar. Justin had used that text to teach Harry and Elaine.
But to cite an example I've used before, imagine a newbie finds a copy of
Elementary Magic by Ebenezar McCoy and
Basic Magic by H. Relmmek (i.e. Kemmler). One source is trustworthy, one is toxic and worse than useless. But how is the innocent newbie to know that he can trust McCoy but Relmmek is a monster out of nightmare?
To make it worse, once the newbie finds out that the Council and Wardens exist, there's the problem that from the point of view on an innocent, idealistic kid or newbie,
the Wardens look like the bad guys. The Wardens
kill people for breaking Laws they never heard of or knew about. They're freaking
terrifying. It's going to be hard for a 16 year old newbie to believe that the Wardens, who
beheaded a friend of his for breaking a Law neither one had ever even heard of, or for using magic in what looks like innocent or even admirable purposes, are actually the good guys (usually).
To a naïve observer, Hannah's complaint about being under a death penalty for defending herself from rapists looks like a case of a victim being hounded by bullies or worse. By the time you discover that it's more complicated than that, it might be too late.
The Wardens are also annoying. They tell you what you're allowed to read, who you're allowed to talk to, what magic you can study and what you have to run away from, and they couldn't care less about your supposed 'rights' under the Constitution or the common law or whatever. You can't read that book or tell that person about something
because the Wardens said so, and that's the end of the discussion.
But they also
are more or less the good guys. Whereas the real bad guys may well pretend to be friendly, easy-going, kind, etc. By the time you find out the truth, it may well be too late.