A new engineer joins a Playwright team and writes a useful test on day one. A new engineer joins a Selenium team and takes three weeks, because before writing a test they must learn the team's private framework.
That framework is unavoidable. Selenium gives you browser control and nothing else: no runner, no assertions, no config, no waiting, no reporting. Every Selenium organisation builds the same six layers, and building them well is the core senior skill for this tool.
The six layers, bottom up.