Agree with your points, and want to add that I've been in the professional software world for 7 or 8 years now and I don't have an active working knowledge of Python, Java, or C. I do have Objective-C, Swift, PHP, and JavaScript. I can hack together some Java or C, and I can recognize Python. I think asking for full working knowledge of 4 different languages is a bit much for a Junior, or even Mid position. Ability to apply knowledge to a language is more important than knowing the ins and outs of a bunch of them from the get go.
Try applying for a job as if you don't have any professional experience. Almost everyone wants Python, Java, and something with 'C' in the name for junior positions. However, in my limited experience, they only (reasonably) expect (somewhat) in depth knowledge of one ecosystem and just syntactic knowledge of the other two. Took me about six hours to learn Python to answer the interview questions.
