First of all, let me tell you that it is definitely not a castle, its ability to dominate a whole line and the fact that it often forgets itself and makes bad surprises makes the castle not only dangerous, but also insidious.
The weakest piece of chess is the king. Although it is not clear what kind of merit he got there, he surrounded himself with horses and elephants against all kinds of attacks so that he would not be harmed. But when he is alone, when there is not a horse left at the table, great tragedies await the king.