I doubt if many people know of Einstein"s parents, but they definitely had an impact on the world.
Just because it is indirect does not make it not so.
The people Scotland produced are as much a part of her history as the wars she fought.
As an aside I remember when they were making lists of the 100 greatest people in history. I thought that no one would say "Sir Alexander Fleming" yet his discovery of penicillin lead indirectly to saving more lives than probably any thing in history. Before 1900 over 90% of people died of infectious disease. After 1950 the number had fallen to less than 10%.
That is a tremendous impact on world history.
And by reductio ad absurdum, some aboriginal Pictish ancestor of the Scots was the most important of them all. This approach, however, does not assist our understanding of history.
As an aside I remember when they were making lists of the 100 greatest people in history. I thought that no one would say "Sir Alexander Fleming" yet his discovery of penicillin lead indirectly to saving more lives than probably any thing in history.
Then why not, by your logic, cite Fleming's crucial parents?