That's just completely, utterly, false. Why don't you also claim you need to buy the official WotC dice? It's about as true as the rest you're saying.
As a group, the only WotC products you need are the original 3 core books, same as with 3E. You'd think this would be obvious from the fact that thousands were playing the game before all the other products you mention were even released.
Yes, if you specifically want to play a class from PHB2, then you need PHB2, duh. If you specifically wanted to play a warlock in 3E, you needed Complete Arcane. This is no different.
There's no reason to buy the "Power" books, unless you'd like more options for your characters. Same as with the "Complete" books in 3.5, and the spatbooks in 3.0. And Complete Martial is not at all a Paladin Supplement. It doesn't have any significant content for paladins, and it's explicitly not marketed as a paladin supplement.
As to the official mini's: these are not at all required, and I've never before heard anyone claim that they were. The same is true for a D&D Insider subscription. That's basically a subscription to Dungeon and Dragon magazines plus some online tools. Do you feel Dungeon and Dragon magazines were required to play 3E? I should hope not.
And what's that nonsense about 4E being a complete surprise? WotC announced 4E 10 months in advance. They even published preview books! And anyone paying attention had noticed that Wizards had been experimenting with radically new mechanics for D&D for at least a year before that, so it was only an open secret that WotC was working on a new edition.
All in all, your post is nothing more than a troll.