Even tough anything could be possible and we could all be a part of a big scam, but I doubt that and your statements aren't very accurate.
First of all, the difficulty of mining the early Bitcoin was very low and since Bitcoin had pretty much no value for some time, mining was rewarded with bigger rewards and that's when the most of the Bitcoins were mined. Nobody could have knew that they would make huge money if they holded their mined Bitcoins, so most of those Bitcoins aren't in their miners wallets for a long time now.