Plenty of people who know multiple languages use Javascript every day. Of their own free will. Because they want to.
What is it about JS that you find so broken that you have such animosity?
I for one know C, Perl, PHP (not just Wordpress either) and even Coldfusion. I'm currently learning Python because I want to.
And I chose to work in Javascript as my main language because I want to. I have no real issues with scoping, am comfortable with the fact it has no 'class', have a good handle on the fact that everything (including functions) is an object.
It is flawed? Yes. But then again there isn't a single language in existence that isn't.