>Fair enough. I guess I am making a bit of a straw-man in that I feel I just don't buy the idea that doing the same thing 10 times over the course of 10 years is somehow worse than doing different things over the course of 10 years.

Different things doesn't need to mean "different domains" which is how you read it.

It can be "things revealing different aspect/failure cases of the same domain" too.

If someone has done the same narrow kind of CRUD app 10 times, they're not CRUD-app experts - they never seen lots of different aspects of CRUD apps.