Why isn't enemy AI more realistic?

[Zkuq]

Probably a combination of several factors:

• Most players don't seem to mind bad AI.
• Good AI can be frustrating to play against.
• In some games, level design doesn't really leave much room for good AI.
• Good AI can be expensive to create. Combined with the previous points, investing in AI might not seem like a very lucrative choice to some.
  • This is especially true for strategy games.