I disagree. Check out articles:

1. "Headless Browser Testing Clarified" https://medium.com/geekculture/headless-browser-testing-clarified-d544ef0acf43

2. "Showcase a 500+ End-to-End (via UI) Test Suite: E2E Test Automation is Surely Feasible for Large/Complex Apps" https://zhiminzhan.medium.com/showcase-a-500-end-to-end-via-ui-test-suite-e2e-test-automation-is-surely-feasible-for-590a45992a23

3. "All those who claimed to be “Automated Testers” and Promoted “Headless Testing” were Fake" https://zhiminzhan.medium.com/all-those-who-claimed-to-be-automated-testers-and-promoted-headless-testing-were-fake-e4596f47b5fd