Ardent Censer and why it's cancer

Literally the games lately have been won or lost whenever a botlane gets ardent censer. Games become increasingly difficult when a janna is in the game because if she presses E, suddenly the ADC has the equivalent of a pickaxe or bf sword in terms of damage. Why is this kind or playstyle rewarded so heavily?

This playstyle allows players to simply farm up for the item, then proceed to damage non-tank champions. The meta currently is not rewarding an aggressive playstyle but instead overtuning the rewards for passiveness. I feel like supports like Janna Soraka Lulu should not gain such a heavy benefit from one item and doing nothing. It should be situational picks, not must picks.

I dont see much counterplay either. tristana or kogmaw or twitch with a lulu janna or soraka by their side are near unkillable, takes more effort to punish, and takes little effort to carry damage wise. It's all that's being seen right now, there's no diversity. The one game where there are no ardent censer champions you notice the difference instantly.

Basically, all i'm saying is that ardent censer-oriented champs are being rewarded just for picking those champs. If one team has it, that team has it so much easier than the other, unless 24/7 5man bot. i just dont see why there are no nerfs to it when the play patterns show its still too busted.