You can think however you wish - and I agree with you - but if you want to be competitive in the modern job market as a web developer, you have to be fluent in client side frameworks.
I agree that having that tool in your toolbelt is important - it's not want the parent post was saying. He was arguing that you're either a Wordpress "not really programmer" or you're a front-end "big-framework-first" developer.
I don't know any front end frameworks either. I know Javascript, Bootstrap, and HandleBarsJs for template and I have done web pages knowing only those.
But no one would ever hire me as a "front end developer" or a "full stack developer" without knowing one.
As someone who's neither I rather disagree.