I don't think you are disagreeing with the article. I took one of the crypto classes recommended. I did well, learned a lot, and enjoyed myself, but in no way d

I don't think you are disagreeing with the article. I took one of the crypto classes recommended. I did well, learned a lot, and enjoyed myself, but in no way does that mean I've mastered cryptography. All in all the recommendations seem reasonably achievable in a few years of conscientious part time effort.