I don't think that analogy really works.

We are talking about the behaviour of a de facto oligopolist, not restaurants of which there are thousands in any major metro area.

If there were a dozen other companies offering the same service as OpenAI can, it would matter far less whether its services were biased, and if so in what way, since probably one of the competitors would offer some very different biases instead.

In the long-term I don't think any of this is going to be an issue. Who cares if a US-built AI has a US bias if there are a dozen other AIs available, of similar capability, several of which come from a different country and so likely have a different country bias instead.

I just don't see the claims as related. Even if a restaurant did make those claims I'd see that as a claim about how they treated their customers, not what kind of food they'd serve up.