If I’m replaced by a DOTA bot I'm going to be pissed. At least it could be a bot for a good game, like StarCraft or something.
* limited choices for actual commands to make, but still lots decision to make.
* a very active competitive community
* easy to evaluate win conditions and (I think?) somewhat easy to evaluate “am I doing well” conditions (like if you fall behind on experience you are doing poorly I think)
So maybe it is a convenient genre.