God created this universe with an aim so is the life of the human. A life without aim is a candle without it's light, worthless. Materialistic approach brings ease in one's life but an eternal happiness comes when one adopts the spirituality.
The questions you arose are a shadow of the life which demands morality, justice and accountability to adopt the life style for which Gd created the universe.
A true and an awesome blog full of philosophy by Great mind @rok-sivante , Highly appreciated :)