I don’t necessarily have anything against React as a technology, but as the old saying goes, a man with one ass can’t dance at two weddings. Almost everyone else at the company are better at the front end than I am but most haven’t taken the time to learn the backend. Why would I learn something, that I still wouldn’t be as good at in a year and couldn’t negotiate a higher pay based on bringing an above average amount of value to the company than other employees? I also wouldn’t be as competitive in the overall job market.

This isn’t directed toward you, just a general comment.