True. It's really a time sensitive matter. If a person doesn't have all the time in the world to spend converting it is definitely worth it to use RM on certain IOs and attuned enhancments.
It is far less efficient to spend RM on enhancements, if everything is equal, but if you can only get onto the game to play then by all means use them for enhancements. If I could spend two hours a week playing the game the last thing in the world I would want to do is be converting.