You can still do all of those things you're talking about. In most cases you don't even need jQuery anymore and can just use browser APIs.
Why do you argue about something that clearly doesn't interest you? From a so-called professional: It's perfectly fine to continue doing websites the way you do if that works for you and your client. End of story.
Everything else that confuses you is just the world of software getting bigger, Javascript being used in different places, people trying out things and promoting them, good stuff, bad stuff, you know – like the real world. Imagine knowing every aspect (political, economical, social) of a larger city and you would go crazy as well. Breathe and relax.
Why do you argue about something that clearly doesn't interest you? From a so-called professional: It's perfectly fine to continue doing websites the way you do if that works for you and your client. End of story.
Everything else that confuses you is just the world of software getting bigger, Javascript being used in different places, people trying out things and promoting them, good stuff, bad stuff, you know – like the real world. Imagine knowing every aspect (political, economical, social) of a larger city and you would go crazy as well. Breathe and relax.