When a builder builds a house, or a doctor mends a broken arm, the community has one more home and one less broken arm - and the community is left richer even after the builder and doctor have been paid.
That house will be keeping a family warm and dry 20, 40, 100 years into the future, and the patient will be using that arm for the rest of their life.
I can see how a person with a job like that could take pride in the fact they've contributed to their community, in addition to the fact they've gotten paid.
Of course, a lot of jobs aren't that way, but have tricksy bosses who will try to convince you they are. Which is what it sounds like happened in Komoot's case.