This is somewhat pedantic. With this logic, you could say that the purpose of a car is to get somewhere, and therefore the optimal speed is c.

But that would be a completely useless thing to say, because we can’t get your Camry to c. There is a whole system of tradeoffs that we all know exists.

Google could easily lower ”bad things” to 0 by shutting down tomorrow. The government could easily eliminate racism by nuking everyone. None of those are interesting or intellectually stimulating discussions.

“Optimal” is different than “perfect”. Everyone else here is talking about it from a system view.