Except nothing else actually does meaningfully better than Google, even with Google being the only thing sites care about optimizing for.
It’s incredibly difficult to do a useful search if sites are hostile and doing everything possible to muddy the results.
That’s the rationale Google uses. “We’re the best, that’s why users pick us.” They built a moat of investment in search and the browser that other companies can’t compete with. But as a consumer, I am not willing to accept that argument. Ma Bell claimed the same thing. We’re a lot better off economically in a world where Ma Bell was broken up, and Microsoft was forced to stop their anticompetitive activities. Google will be better off as separate companies, worth more than the sum of its parts
None of this is relevant to the fact that your claim isn’t even the weakest of weak evidence for your position. It is literally completely unconnected. SEO is a problem because searching through adversarial data inputs is not a problem anyone has shown any capacity to solve.
And Google’s search engine is a singular product. There is nothing to break it off from. Its position is exclusively the product of the fact that there is no other option that’s remotely functional. Search is hard and no one else even has developed even a mildly interesting alternative.