[DEV Question] Why is this allowed?

[Serilda]

Like if you had on a i260 weapon and queued for a duty (avg ilevel 230), went in, then tried to switch to an i110 weapon the game would give an error message like "the item level you are trying to equip is too low for this duty"

Yes, that would be fine. Though maybe relax it for unsynced runs or something so people could do silly challenges with their friends. Full groups trying to clear shouldn't be full of people farming 2.x light or other silliness.