The lack of mail/agenda/contact client, is actually an commercial error. If you own a BB phone, it pairs seamlessly with the tablet, just go away, and the tablet wipes out all personal data.
I find this clever but badly sold, as it is the best multi user solution for tablets. The idea behind this was for companies with fleets of phones and tablets, you could pick up any tablet and go your way, knowing you get everything once paired with the phone. The consumer market of course needs a built in client, that should come with the next OS
You are right in saying that if you eat too much you won't jump from fat to thin once you reach 359° on the circle.
As for the difference between your brother and yourself, it isn't applicable, because objectively your belief are constructive ones trying to change the world for what you believe is better.
Your brother on the other hand is in a delusional circle, trying to blame on higher obscure manipulative forces what is mainly the human propension to be selfish and clumsy. There is no real conspiration. The circle theory doesn't apply in that context.