React has a server-side rendering API. So, I find it difficult to rationalize an argument where FB purposefully launched React to get people to return virtually

React has a server-side rendering API. So, I find it difficult to rationalize an argument where FB purposefully launched React to get people to return virtually empty HTML documents from the server (at most, a script tag which "boots up" the page content) in order to make the task of indexing difficult. Facebook indexes many sites themself for link preview functionality. Preview images, page title, description are all derived from open graph tags.