Think of all the people whose job it is to help you.
- Doctors.
- Firefighters.
- Policemen.
None of those people serve you advertisements.
Now think of all the people who do serve you advertisements.
Sure, any of them could make an argument that their work helps you. TV helps us escape. Google helps us find things we need. The news helps us stay informed.
But their job performance is based on selling more ads. Not by helping you.