Many organizations seem to devote a tremendous percentage of their resources to fundraising.
If you are not on the program side, you will be relegated to support functions - often, you will not feel you are directly making an impact. It depends on the organization, true- but also on your expectations and your appraisal of your other career options. For example, I'm a writer. When I got my first job out of college, I had been applying for publishing jobs and getting turned down for positions that offered barely a living wage, little or no benefits, and no possibility of advancement. Then, experimentally, I applied for one job in nonprofit public relations.