Really terrible take seeing as Javascript devs span all areas of focus and every level of experience, and education.

I've seen plenty programmer's with CS degrees make terribly dumb mistakes, and some self-taught developers are some of the smartest people I've worked with.

There are more javascript developers, because JS is far and away the most popular programming environment due mainly to its ubiquity on the web. Because of that the JS supply-chain is a much larger attack surface than most languages.