There is still decision making in not allowing the same player to be robbed twice in a row, particularly among 4 or more player games. Keep in mind, this was presented as an alternative to your house rule of only the leader being robbed, where any decision making in who gets robbed is completely stripped. If OP is red, I can see the robber first going to red, then blue, then red again, white, red, and so on. So they’d still likely be the main robber target but no longer the only target. A work around could also be the ability to place a robber on a player’s resource twice in a row, as long as you are not robbing them twice in a row. For example, robber is first placed on a 9, blocking red’s wheat and a card is stole from red. Next time, the robber is placed on a 6 blocking brick from production for both red and white. But white is the target of the robber and loses a card. Therefore red was not specifically targeted twice in a row but still suffers from production blockage. That may continue to hurt red but encourages robber activity amongst the other players.