That's just basic marketing. You'll see that in most countries, I don't believe that it is unique to Switzerland.
For example: in the US you'll see many products that say "made in America" on the box. Those will likely outsell competing products, even if those are cheaper and better quality still.
And similarly: if you try to sell the "made in America" product in a different country it'll likely by outsold by the "made in [country]" products there.