You mean like when Europe approved thalidomide but the US said “just because they approved it isn’t good enough” and saved tens of thousands of babies from birth defects?
It's true that the "European FDA" sometimes approves things they have to recall later. But the American FDA also does that. Only rejecting by all medications can you avoid that.
My thought is that medical science works the same way in Europe as in the US, so if it was a scientific matter, approvals would be "portable".
I think a model that explains things better is that the approvals are political/regulatory. And I wish the were scientific.
