Some game developers and fan mission designers are just pure evil and want the players to suffer. For example, they make the enemy such that it will single-mindedly attack and pursue you, without even giving you the chance to explain yourself. If only you could talk to these creatures, then perhaps you could try and make friends with them, form alliances... Now that would be interesting. But, alas, we can only ever speculate on their motives and perhaps see them preach their wicked craft at GDC, if we are lucky.