Here's why:

* The word "environmentalist" is broad. It encompasses a diverse group of people with varying views on the best ways to protect the environment. Some might focus on conservation, others on sustainable development, and others on tackling climate change.

* Different approaches to preservation. While all environmentalists share a common goal of protecting the environment, they may disagree on the methods and strategies. Some might prioritize strict conservation measures, while others might advocate for a more human-centered approach that balances economic development with environmental protection.

* Individual differences. Like any group of people, environmentalists have diverse backgrounds, values, and beliefs. This means that not all environmentalists will have the same level of commitment to preserving the environment or agree on the best way to do so.

In essence, it's safe to say that the vast majority of environmentalists DO wish to preserve the environment. However, there is a spectrum of opinions within the movement on how best to achieve this goal.