Gumpy,
So far....I have not seen the good side in it, that is, as regards to life and it's purpose. How can not knowing why and how we here......be a good thing.......if it brings discontentment throughout your life? Unless you reach a point where you are comfortable at NOT knowing these things.....then I do not see a good side.
I can, off the top of my head, think of two reasons as to why "not knowing" can be a good thing; one is teleological in nature and the other is completely subjective.
Let's take subjective first: "Not knowing" will always leave open the possibility of your true hopes and aspirations. Personally, I would like for there to be something "more" beyond my finite, human existence. Is there any proof whatsoever for that hope? No. All the same, since you cannot prove non-existence it remains a possible option. (This is a very tenuous argument, I admit. It also leaves "open" the possibility of your worst nightmare!)
Now, the more important reason: Have you ever heard the old expression, "the journey was more important than the destination"? I'm sure you have. We all have experience the joy of the process of finding out. Even when we didn't know, the very prospect of "figuring it out" and knowing was enjoyable. If this is part of The Grand Scheme Of Things then it would make sense that we don't have "proof" for meaning, purpose and telos -- because it is, in the long run, more enjoyable not knowing (for now)
Make sense?
Bradley