So most average people who buy carbon bikes are wasting there money better buying cheaper bikes like aluminium
Well, perhaps waste is the name of the game these days.

We eat too much, what a waste. We pay for 'stuff' we don't need what a waste. We buy cars instead of cycling, what a waste. We throw away perfectly good clothes instead of repairing just because they have one hole in, what a waste.
On the other side of the coin, if you've got the money who are we to say what is waste. If the average bloke feels good on his mega expensive carbon bike fair play to him.
At least he's not spending his money on loose women and booze!
