BYD's allowed to sell in Europe. They're not crushing the market here. They're not substantially cheaper, or better for what they offer for the price compared to other manufacturers.
BYD could slash european prices by quite a bit. They price them competitively to take advantage of the margin. The increase in price compared to their domestic MSRP is pretty wild, 2x in some cases. In a race to the bottom, they will win.
You're right, but comparing Switzerland to America... You need a car to live in 90% of the USA. That said, talking only about specs or prices is pretty reductionist. If anyone on this forum could forecast car sales based on pre-delivery marketing, you know, become a billionaire investor.