I completely disagree with the tactics statement.
I've only played about 30 minutes of DOTA:2, but I know in League of Legends there are a lot of tactics involved. Working with your jungler to set up ganks, baiting champions in, different builds for your champions, team composition synergy, when to take objectives, when to split push, when to team fight, farming/versus aggressive play, etc. There are a lot of tactics involved.
To each their own though.