If you are any good with those four languages, you are leagues ahead of anyone who does Javascript full time.
Speculating on what my motivations may have been rather than contributing actual substance to the conversation (more than just some in-passing anecdote) doesn't make you a good person, just a prig.
> If you are any good with those four languages, you are leagues ahead of anyone who does Javascript full time.
That is a priggish statement, and comes across as ignorant.
I’ve been paid to program in many different languages over the years. Typescript is what I choose for most tasks these days. I haven’t noticed any real difference between my past C#, C++, C, Java, Ruby, etc programming peers and my current JavaScript ones.