1. Environmentalism and Consumerism: The film is a stark warning about the dangers of unchecked consumerism and its devastating impact on the environment. Earth is depicted as a wasteland, filled with trash and uninhabitable due to humanity's reckless consumption. WALL-E, a small robot tasked with cleaning up the mess, becomes a symbol of hope for a sustainable future.
2. Isolation and Loneliness: WALL-E spends centuries alone, only finding companionship with a cockroach and a plant. This portrays the emptiness and alienation that can result from a lack of human connection and interaction. When he encounters EVE, it represents his yearning for connection and love.
3. The Nature of Humanity: The film examines humanity's ability to learn from its mistakes and reclaim its potential. The initially obese and reliant humans aboard the spaceship, the Axiom, are forced to confront their inactivity and rediscover their physical abilities and connection with nature.
4. The Power of Hope and Resilience: Despite the bleakness of the setting, WALL-E embodies hope and perseverance. He never gives up on his task of cleaning Earth, even though it seems impossible. He also demonstrates the power of love and its ability to overcome even the most dire circumstances.
5. Technology's Role in Society: While the film criticizes consumerism, it also explores the role of technology in our lives. WALL-E himself is a testament to the potential of technology to benefit humanity, while the reliance of the Axiom passengers on technology highlights the dangers of unchecked reliance.
So, "what whole reason" is subjective and depends on what aspects of the film resonate most with you.
However, it's safe to say that WALL-E is a powerful and thought-provoking film that encourages viewers to reflect on their own relationship with the environment, consumerism, technology, and the importance of human connection.