People will still sell gears or gold for real money with or without RMAH so Blizzard made it legal to trade in their AH and also making good profit from it.

If you don't feel like paying for it then it is your choice but there are millions of people playing the game. Some who don't have time like myself to farm my own items and wouldn't mind spending a few hundred on an ingame item. I for one am enjoying the game and also the legal real money trading. Who would mind earning an extra USD100/day as a part time income?

Inferno was expected to be hard. What is the use of good items if you can beat the game in a week?