ROX vs SKT teaching us valuable stuff

It helps to win early...

Tanks are also much stronger at low elo than at high elo. They play better from behind. They are more forgiving of mistakes. Damage dealers will logically excel more at high elo - they are better able to capitalize on mistakes. They excel at closing out from ahead.

And finally, most importantly, the key role of a tank is to provide crowd control and a front line that can eat damage. ROX's team STILL DOES THAT. Ashe arrow is one of the strongest CC abilities in the game. Lee Sin has hard CC in his kick. Viktor has his gravity field. Rumble's ultimate is an incredible slow. Both Rumble and Lee are able to be a front line and absorb damage.

There's really nothing wrong with the team and it doesn't imply that tanks are useless. It just shows that there are enough unique champions to make a viable comp without tanks. Also, remember that this team won with early leads. It's a clever comp against a team that constantly makes comebacks because it has lots of options to close out a game when it has a lead (most demonstrated are the Ashe arrow picks, and the insanely fast Baron take with Viktor's zoning denying a steal).

At anything below Diamond 1 though, the team with tanks is probably going to be favoured 55-45.

Basically if you don't have GA and you gets focused in the mid and late game, even if you are a tank you gets instantly deleted. The damage meta is actually insane.

Team work and good communication is the most over power thing in lol. You can have the best team comp and still lose fact

Using your same flawed logic, could barely scratch that in game 5 and ROX lost that game so ROX taught us that you can draft a team like that and get walled by a tank for days. I'm starting to think people who post this "damage to high" threads are under the idea that tanks should be un-killable walls under every circumstance