It's not just that, it's that every couple of months some "new hipster trend" appears on HN/Reddit and everyone jumps the train and declares that "all new web apps must be using angular" (or similar, you know where I'm driving to!).
But hey, hasn't anyone ever noticed people still build their websites in PHP (and some of the most used Web software is written in PHP, too)? I'd say, better learn PHP and solid HTML and try not waste too much time with learning a new JS framework every other day.
Chances are that if you use Angular today, in six months $new_consultant will say "oh, framework FOOBAR is much faster/easier, lets waste everything done so far and rebuild".