I totally agree with Talisman about the analogy of your favourite meal... This is why I feel a lot of talented youngsters are being put off the sport because of the amount of time commitment they have to make. If the shortened form of the game was promoted more at all levels, it would spark much more interest. When it comes to a 20 over game I would jump at the chance to play... Its a good chance to make a few runs, but if you do get out, you don't end up sitting there for hours and then having to go and field for another 3 hours. You might come out with some more crap about "never had a problem in our day with 50 overs", and that may be true to a certain extent, but people lead much busier lives these days and just because you didn't have a problem with it does not mean it shouldn't be changed for the better.
As for your comment about pressure art, of course there are techniques to help you live in the moment and manage the nerves that come with it, but you are living in cloud cuckoo land if you think that any professional cricketer is an enlightened Buddhist Monk. We are only human, and of course over time we can work on the realisation of what "pressure" is, but its easy for you to say "there is no pressure, this game doesn't really matter". The reason professional cricketers got to that level is largely because of their willingness to win and the competitive pressure they put on themselves to achieve victory. With that comes anxiety, fear of failure etc. and not only that the nature of the sport means, especially for batsman, where your performance relies on delicate reactions to incredibly brief stimuli, that players are very vulnerable to their performance being affected whether positively or negatively.