Hate to tell you this, bit 99% of apps built with React are rebuilding what has already come before. Namely, taking some information from a database and displaying it on a screen, and taking some input from a computer and putting it in a database.

Almost every web application being built today, framework or no framework, is a variation of a theme. We have no issue recreating those ad nauseum, but we draw the line at recreating a framework?