Evolution tells us something but it cannot explain everything, And we're still learning. And Evolution doesn't and will never explain why we're here, it can tell us how we came here or how we descended to our present state. But there will always be gaps here and there. It's up to people to learn the Scientific truth and philosophize for themselves.
A lot of what you ask can never be answered by science. Why we are here is a subject outside science and more suited to theology or philosophy. Doesn't mean they aren't important questions, just that science can't answer them.
Precisely. Science should be taught in science class, and Philosophy should be taught in philosophy class. It is when folks demand that philosophy be taught as science that I disagree.