The arrival of Kenley Truth brought many new magical ideas to the Magic Guild, as well as a large collection of Magic Books. In particular, her experience studying with the Court Grand Mage helped her understand the mainstream development of the magical world in the Steel Ridge Kingdom, which was outside the scope of what magicians from remote island nations could access.
However, there were Archmages here.
Liszt had the intention to mythologize Ach, avoiding arranging too many interactions between Ach and the common magicians, and he did not disclose the methods of advancing to Archmage. In truth, even if he disclosed it, it wouldn't matter much; in the current state of the Magic Web's contraction, telling Grand Magicians how to touch the Magic Web wouldn't help them to actually reach it.
Even a talent like Ach had barely touched the Magic Web with the help of Mermaid's Tear.
How could the common folk fathom the unattainability of the Magic Web?
