Eli Y,
I have not consulted the letters myself but I am told from my Rabbi who is trustworthy that he has observed remarkable coincidence between the letter picked at random and the seekers issue.
This is why horoscopes are so popular. People can pull out from them what they desire. It may be an amazing feeling for someone to believe that they are getting miraculous, supernatural responses, but the system Hashem set up for us through His Torah was to go to a living, breathing Torah authority with our shailos. After Moshe Rabbeinu passed away, when the people sought advice, they didn’t pick out random statements that Moshe Rabbeinu made and try to fit them to the question, they went to Yehoshua!