I cannot think of a practical reason why Segwit needs to be activated in LTC if the coin itself does not attract enough users to make it necessary. What if it becomes activated but nobody uses it? What good is it if it is not really that necessary?
Not correlated. It might not be useful for litecoin , a cryptocurrency that has low volume and mostly exchanged to btc anyway. It is however could be a very needed thing for btc, which is used by a lot more people, have a much higher volume and used to do what fiat currency does. You might be right, but you might be totally totally wrong.