Reminder that even the oldest of official policies in the US are just over 300 years old. Two magnitudes less. Most policies currently in use are less than a hundred years old and are a result of changes and amendments to those that proceeded them.

Even common law is only a thousand years old and has been revised over time.

None of that has anything to do with the issue still being relevant now and for the foreseeable future, ie the colloquial definition of “always”. When that eventually changes, then it can be re-evaluated, but that’s not likely to happen within our lifetimes, so it should very much be remembered when policies are made.