First problem is that the country is minute, so one keeps bouncing off its borders. Second problem is that whilst being centered in Europe it ain?t really part of it, which in turn means that administration makes it a hassle to fly to or from another country: try for example customs designated airport for departure and arrival, advance customs movement message, mandatory flight plans, additional fees, etc.
Good thing the flying in the mountainous area of Switzerland still has its challenges and awesome landscape