I disagree with the statement that a framework like react is something that's easy to pick up. It's true that having solid fundamentals will help you learn it faster, but this alone will not make up for the complexity that a framework brings. Perhaps because the author uses react every day that they think it's easy, but it would take months to understand how to use it at its best. Additionally, if a react shop is hiring a new front end developer, it makes sense for them to hire a react developer. A developer with little experience in the framework will not be able to provide insights on how to make development easier for the team.