100% agree with this. From my experience good front end developers are much harder to come by in silicon valley. We use a general coding interview process, and really struggle finding experienced front end developers because its a hard position.
When I have to touch javascript, I break everything, beg for help, then run back into my enterprise java code. This elitist backend attitude to me seems to stem from insecurities of us nerds. I personally feel inferior to front end developers, the ones I know are freaking magicians.
Ah, also, not sure if you were joking, but I don't think using JavaScript (TypeScript, that is) in both frontend and backend is a bad idea. Having a shared (domain) model can be a real boon. Admittedly, JavaScript lacks a few things that is offered by Java and the like that makes not yet fit for larger applications though (say DI, modularization and so on).