If one trader trades 50 times a day, which is nothing for a professional day trader, think of all that money being transferred on the exchange itself that should technically be transferred by the miners, not the exchange!! We're being robbed out of thousands if not millions of dollars a day because the exchange is making the profit from the trades.
Self entitled much? The transaction occurring off network aren't using your service, it isn't costing you anything. Are people who pay by Visa stealing from you as well? What about people who keep funds secured in cold wallets and don't move them? Most people fund their brokerage or forex accounts by a single bank wire, are all those trader stealing from the banks because they don't use the banking network for every trade?
Where do you get the idea that you have a right to profit? Profit is earned. If you want more transactions than encourage more adoption. You aren't entitled to a specific level of profit or even the guarantee that you will profit at all.