It's not rocket science. What is the purpose of the interview? For the company, to find out if you are a good fit for them. The questions must be interpreted in that context.
That you need money is not interesting information to them, that will be true for (almost?) all other applicants too. So when they ask: 'why do you want this job?' they mean 'why do you want THIS job?' so they actually do literally say word-for-word what they mean. So you answer with stuff like why you might like the job, or why it is a good career step for you, or why your skills make you a good fit.
That's not responding to the point in my comment, which was about whether NTs are actually deft in communication about facts, as claimed.
If what you describe were the only issue, it would, at most, be a minor hiccup while the interviewer clarifies what they actually want in the answer -- i.e. are they validating that you have reasonable expectations about what you can get out of the job? Or that you have relevant qualifications? Both?[1]
If they're utterly stymied or write off the applicant on the basis of that answer, then yeah, that would validate the point that they're bad at "talking about facts!" Ditto for the other two examples, like where they interviewer refuses a chance to clarify, and leaves it open to guessing the secret desideratum.
Also, FWIW, it's kind of generous of you to discount the possibility that they're looking for indicators that you're desperate for work that they can't ask for directly.
[1] Note that another reply gives a different "obvious" interpretation, the confrontational "Why should we care?"
That you need money is not interesting information to them, that will be true for (almost?) all other applicants too. So when they ask: 'why do you want this job?' they mean 'why do you want THIS job?' so they actually do literally say word-for-word what they mean. So you answer with stuff like why you might like the job, or why it is a good career step for you, or why your skills make you a good fit.