It's simplicity allows you to do some tasks that would be complex in wiremod much more easily, although it doesn't have all the same functionality. Most importantly, it is designed more to work with the player and bricks, rather than physics. Sure, wiremod supports data storage and a bunch of other nonsense, but originally it was just setting off turrets when people walked in the wrong place, or making people need to push buttons in a certain order to open doors. Blockland events replicate that sort of thing, and allow you to do some other things wiremod doesn't do, such as modify player health, turn them into horses, and shrink them.