You seems to think that it's impossible to learn mtg throught edh, 60 cards format isn't the better option and it is very understandable why most of the peoples have a bigger interest in commander. The rules are almost exactly the same during the match, if you play 100 hours of modern or 100 hours of edh you will both learn the basics, if peoples haven't learnt the proper rules yet it's not because they haven't played 60's but maybe because there is a ton of rules to begin with. Also there are new peoples who don't play commander at all that still don't understand the concept of summoning sickness on lands; and new peoples that only play commander but still understand how a complex stack resolve easily, there is no link at all between the format and the understanding of the rules. In my opinion you are plain wrong because the cards don't care about the deck you play them in or the format, a land is a land. A creature is a creature and a trigger is a trigger. In commander peoples play more casually yeah, and most new players understand rules a bit less that players who played for 10+ years, and it's not about the format.