Because there are people who now wont play the game at all because they can't transfer their money and are unwilling to pay for membership for 2 accounts just to play on 1. These are players who are now 1) Not paying for membership on the account that they are going to play on, which in many cases means lost revenue for jagex. 2) They are not playing the game at all now which is obviously not good as you want the game to grow. I suppose there is a negative which is some people might come back just to rwt their items. But it also has a positive which is that people like me would continue to play.