To be blunt, European tech companies don't seem to be doing amazing vs. their American competitors. You can see why American companies wouldn't necessarily look to their practices as a model to emulate.
It’s true that American companies are hard to beat on their fields such as workers exploitation (Amazon), privacy violations (Google, Facebook), anti-concurrencial practices (Microsoft, Google), censorship (Twitter, Reddit), tax evasion (Apple, all GAFAM actually), etc. Real amazing job indeed.