These are myths from ancient Greece that I heard from random players back at the beginning of the millennium. In fixed-map games, it's not the biggest hardcore player who wins, but the person who comes up with the most well-thought-out plan and manages to implement it in the current situation...
And as someone with experience, I'm telling you that some maps were played so meticulously that every single tile was optimized, right down to reaching the opponent. I don't remember the names, it was about 15 years ago. I remember one where you had to get in a boat and sail across the water to take a hidden resource. Everything was strictly planned down to the tile for the dungeon.
And in a tournament in St. Petersburg against Matrosov, I personally implemented a plan that wasn't just "in the current situation," but a specific, rigid pre-planned strategy, where a mage goes to the opponent's base from day one with a light hero, leveling up in all the houses along the way, picking up chests, and killing the light hero in the beginning of the second week. And to hell with the current situation.
And on the Desert map, with the relic (+6 to everything, I think), the game is played with almost tile-by-tile precision (well, with some small variations for less skilled players). And all of this is prepared before the game begins.
This is what always annoyed me about tournament fixed-map games. :D