The two words also mean literally the opposite thing. You can be along a spectrum from one to the other, but you can't have both at once.
We all love to say how true diversity is diversity of experience. You are literally taking about unified, shared experiences.
Surely a new set of common experiences increases the diversity of thought of all the participants? Nothing's lost.
This statement is absurd on its face. The entire premise of the benefits of diversity (of thought and experience) is predicated on the subjects in question having had unique experiences.
>Is it your contention that a new experience deletes or diminishes previous experiences?
Somewhat, yes. When I went to university, the shared experiences there hugely overshadowed what I had experienced in my prior education.
Why do you think diversity and unity are mutually exclusive?