I think the inclusiveness of the statement is the issue. He didn't say "the majority of the people writing JavaScript", he implied all of them. I'm sure there'

I think the inclusiveness of the statement is the issue. He didn't say "the majority of the people writing JavaScript", he implied all of them. I'm sure there's a lot of people who are writing decent JavaScript. But running JavaScript is easy. Every single computer comes with a JavaScript development environment. Because all you need is a text editor and a web browser. The barrier to entry is so low it might as well be non-existent. So a lot of people with no clue of what they're doing will get in there and write some atrocious code.