Cutting down damage in general.

It has been said time and time again. Damage is too high. Tanks are getting oneshot. Everyone is an assassin now. The game is now about bursting the enemy before they burst you. It seems like a lot of things are being buffed and not enough things are being nerfed. So I suggest this solution. What if there was a game-wide nerf? What If we reduced all damage in the game? Reduce base damage on abilities and runes and reduce scalings as well. Of course some things would be nerfed more than others. I feel like lowering overall damage would allow the game to slow down a bit and allow for more strategy. I just finished my placements, and most of the games ended like this: we caught 1 or 2 people away from the group and deleted them, then we took baron/got the dragon soul and ended. I remember when I joined League in Season 7(yeah I know, I'm not that experienced) games weren't as burst heavy and all about unloading your whole kit onto someone, or in the cases of some champions, onto an entire team, and oneshotting them. I remember when to wipe out the entire enemy team at once, you had to coordinate with your team and set up a really good teamfight. Assassins are my favourite champs, but with every champ being focused around bursting down the enemy squishy, the only thing that makes assasins unique now is their mobility. Tanks used to focus around ccing the enemy and soaking up damage for the team instead of the damage dealers. Now they are all about surviving long enough to kill the enemy squishy. Adc players have it pretty rough these days considering everyone's main goal is just to kill them. There are no more defined roles in a teamfight anymore.

Anyways, this is coming from a silver level player, so there's probably some things here I am wrong about. The point of this post is to spark discussion anyways.