No there isn't anything inherent in the way commercial TV happens to work in the US. There are many other models, including, but not limited to:
- Taxpayer funded television (ala BBC)
- Direct viewer funded television (ala PBS)
- Subscription television (ala HBO, Netflix, etc.)
- Television subsidized by some organization that doesn't advertise but wants to produce content (probably doesn't currently exist, but could)
- Community produced television (ala cable access)
- Any other model you'd like.
Just because the current model exists doesn't mean nothing else could work, and doesn't mean that I should assume anything when I turn on the TV. There's nothing inherent about advertising.
- Taxpayer funded television (ala BBC)
- Direct viewer funded television (ala PBS)
- Subscription television (ala HBO, Netflix, etc.)
- Television subsidized by some organization that doesn't advertise but wants to produce content (probably doesn't currently exist, but could)
- Community produced television (ala cable access)
- Any other model you'd like.
Just because the current model exists doesn't mean nothing else could work, and doesn't mean that I should assume anything when I turn on the TV. There's nothing inherent about advertising.