That is an alternative way to see it, I appreciate the effort. However, we shouldn't forget the reasons why we have speed limits: safety.

It is just not safe to drive 80mph in the city center, for instance. And should be just avoided.

A different story is 190mph on the highway. It can be ok under certain circumstances: low traffic, good weather, good car, your age, new tires, just an odd example.

So no, some speed limits should be enforced at all costs.