Helping people can help one find their purpose, and increase their empathy and humanity towards others. In whatever the purpose, learning to help people without ego, or attention, or acknowledgement is essential for anything you choose to do. One cannot help others if they are unable to curb their ego. Fighting against that instinctively human emotion while helping people is a difficult task but one that begs to be mastered. If not, you start 'believing your own hype'; getting lost in arrogance, the addiction to the rush of authority or control. The humanity in them is weakened when they chose to follow their ego. It leads to thinking they 'own' the people they help to some extent; taking the credit for the completion/fulfillment of their purpose and accomplishments. Stripping someone of their work and rewards by saying 'you/they wouldn't have ____/been able to do____ without me and my help!' is one of the most selfish things a person can do to another. No one has that power no matter how much 'power' you think you possess.
Helping people as a means to fulfil selfish pursuits, and desires to be publicly acknowledged and praised devalues and undermines any good one may do because they refused to reconcile with their ego. The helper is not the measuring stick for which the helped must measure their successes, work, or achievements. When your intentions are rooted in anything but empathy and love, no one is helped.