I used to think this way about therapy. After all, they stop getting paid from you when you stop seeing them. But then I realized I love programming. It's my favorite thing to do, and I love getting paid for it too.
There are people that love what they do, and they should get paid for it just like anyone else. That being said, getting paid as a therapist is different than targeting infinite growth and profit. So hopefully this app is made by someone who likes the idea and wants to be paid, not someone just looking for a profit.