They can of course try that but their clients have little reasons to trust them. Apart from that it might be very costly to develop, test, and distribute two versions of each product and to maintain compatibility, all of which puts US companies at a disadvantage.

There is already plenty of evidence for the idea that the privacy crisis helps the European industry. Many new businesses in several European countries are successfully selling privacy-reserving software and services and their future crucially depends on the trust of their customers, so they have to take privacy serious in ways that US companies don't have to, at least for now.