Right. They're prototypes of a nation not at war. They weren't produced because they weren't considered useful enough to justify the expenditure. Rather obviously, an aircraft in service in a peacetime air force isn't going to get kills.
This does not mean that other air forces weren't influenced by the idea, maybe even producing thousands of aircraft inspired by the prototype. Aircraft designers and air force leaders didn't-- and don't-- operate in isolation.
How does what you say prove me wrong. We are talking about an aircraft with air kills and aces. We are talking about an aircraft that came into service and did operate and was the first of it's kind to do so and then other air forces who were initially skeptic, as you admit, decided to follow and fund their own designs.