The EU has a bunch of reciprocal trade agreements with the USA to not engage in punitive harassment of each other’s companies. Of course they still can, but that’s what’s called a “trade war” and it’s generally not a good thing for all involved. Public perception of these changes in the US is also very important, since if the US government chooses to view these actions as punitive harassment calculatedly targeted only at US companies, it will respond with tariffs etc on EU goods.