Not at all. One example is the Romeo and Juliet quest, as a good character you can help their families understand each other, they get together and everyone is happy. On the evil side you can make everyone go to war, even the couple, by conspiring, you watch them kill each other then loot everything! Just one of the quests I think the evil side is way more interesting than the good one.

The vast majority of evil paths is like that in KotOR