Continuing this take. From a storytelling point of view, they should've made it so that having a lightsaber was extremely difficult, the defining feat of a master Jedi knight. Something that padawans trained to use eventually but was an actually really hard, life threatening even, object to create. Crystals should've been an statistical impossibility, involve a pilgrimage and ceremony, you'd have to be a keen user of the force, train your sensibility to it, master the skill of manipulating life and matter through the force to construct it. Sabers had to be relics, with names, history and mythology. Handed from master to padawan when they became knights through the ages. Further symbolizing the master-apprentice relationship. Thus there can't be any more apprentices than there are masters. Sith would have to kill Jedis and steal them, corrupting the sabers.

But Lucas was a meh world builder anyways, so whatever.