User blog comment:Megames1/Against the Meta- (Insert X Champion) is UP/OP because (Insert Y Reason)+More/@comment-5686533-20121110222130/@comment-76.187.209.68-20121111040144

It's honestly all about perspective and how they want to get the game mechanics to flow.

Riot is very scared/wary of "power creep" which means that if they keep buffing champs, eventually none of the non-player factors affect fights and such as significantly as Riot wants them to, such as towers and jungle monsters.

tldr; Riot likes to keep the game at a steady and smooth line of champions instead of champions that can tower dive all day any day and tower shots are like tickles

The devs of Dota 2 are probably more laxed about it and want to make it all about the player's skills instead of reliance on non-player factors, but they will eventually stop the "power creep" until they buff up those forementioned factors because the game still needs to have a structural "take the towers that can beat the shit out of you" gameplay instead of "duel all game every game every second every spot"

tldr; Dota 2 devs want the game to be more based of the player's skills instead of reliance on towers and creeps to fight half the battle for you.

Don't quote me on this because this is just how I see the situation with the information that is presented and known, which I can be completely wrong on this one.