Attacks While in Bush

So I'm confused about how attacks/abilities are shown while in bush, Mainly to the fact that they're not shown if an enemy is in bush and the other team doesn't have vision. I understand that the devs have decided to make it that way, but then what about ? He is the only champ that I know of that can be seen while in bush even though the enemy team doesn't have vision in the bush.

I'm not sure if it's because it's his passive that shows through the bush and not technically one of his abilities, but should that be any different? It hardly pokes out that much considering that there are that use their ult in bush and it isn't shown at all for the whole duration unless there is vision in bush, and that goes pretty far out. Or like with using his smash down, he doesn't get revealed even when he uses it.

I'm not angry about any of this, I'm just confused as to why 's passive is the only thing that can be seen with no bush vision.