there's like, 800 ways, to get to the king, Including one where you can almost walk right up to him from the front (its like a small staircase of rock faces)
so that one is probably intended.
The castle isn't intended, but its not important to actually keep people out of it, and I imagine as the Castle is fleshed out more in the future, that there won't even be a quarantine, unless the Quarantine relates to a certain something(s) else, in which case, You, the blacksmith, will have control over/a heavy... say, in when it can be accessed again. (as in quarantine lifted/fixed/etc)