A little bit of luck is really helpful in allowing for diversity in game flow. Something like a mechanic where resources open up on one of 3 random turns means

A little bit of luck is really helpful in allowing for diversity in game flow. Something like a mechanic where resources open up on one of 3 random turns means it's harder to reproduce an optimal strategy etc. Obviously luck is not necessary for a good game, but I do think it makes certain elements of game design easier.