Let me always click lantern if i can always attack a Champion.
If its not a mechanic to be able to hide your body behind a tower or Nash. Then it shouldn't be a mechanic to block a lantern with a body.
I died so often when i could've been saved by a lantern. If you want to hinder someone from taking a lantern then you need cc. If you don't have any CC then you shouldn't be surprised that someone takes the exit. I think its kind of lame that a Champion ability is nullified so easily.
If i'm missing a trick to clicking it i would absolutely love if you shared it with me. Maybe i'm just bad.
Also here an old Post where i described a Utility Only Key that would solve this: https://boards.na.leagueoflegends.com/en/c/gameplay-balance/gevaLRvH-target-utility-only-key