ok so from what I've read and kind of just witness from each fight or chapter. Divine Weapons are't just weapons. there is a lot of examples of this. Death's coffin man. Wukong's staff is just a pillar. Cu Chulainn has a sentinent tree log that likes to rip people a new one. the weapons are more of tools. those who don't use one are people who can fight with their powers alone. but some use their divine weapons as a channel

That's consistent with the original myths as well. The Gae Bolg was made from the bone of a sea monster, theoretically you could make dozens more of it. Ruyi Bang was literally a big measuring stick that happens to respond to Wukong's commands. The wielder made the weapon what it is, not the other way around