That's important because monetary rewards will always be in short supply. However, sometimes people in human services feel guilty about wanting to get self-satisfaction from their work. Those guilty feelings are unfortunate because there's nothing wrong with wanting to like the work you do. There are many different ways to help, and some people are not equally well-suited for all of them. It makes sense to look for work that is both satisfying personally and helpful to others.
Every career has both advantages and disadvantages.
Some of what you do will be rewarding, and some will be unpleasant. Each of us is unique in terms of what we find rewarding and how much reinforcement we need to feel self-satisfaction from our work. That's why it's important to know yourself well enough to pick a job that is a good fit. One useful exercise is to make a two-column list. On one side, list all the rewards you get from your current work.