I have no problem with drawing as part of the magic system, although you have to plan ahead to get rare magic like Pain. Rather it's the way the game discourages you from casting junctioned magic since it decreases the stat boost. The game pressures you into hoarding and stockpiling magic and never using it.

You can get around that by stat maxing using Devour, but there's no incentive since no enemy is so strong that stat maxing is necessary.