Someone created a YouTube video talking about how bots are becoming harder to notice in online games and the person's like how can you really tell if you're in a real match.
My simple answer is because I normally high ranked people are extremely abusive and chat and constantly called each other slurs.
The developers don't have enough balls to allow the bots to use slurs.
@Mr_NutterButter
So, we went from every game having bots for fun, to bots being extinct to finally going full circle by players being bots......
The nature is healing I guess?
