Good for the engineer who is an expert in those audio and video testing and can get hired for the role. We should be thankful engineering has provided many folk who were previously poor, an opportunity to rise to the middle class simply by studying and being smart.
You're right but I think you're missing the point. Offering a range that broad in the job listing is just an effort to flaunt a law. That law was put into place to help the people you're talking about.
There are true superstars out there that some companies can afford to compensate properly, but they are generally remarkably atypical and their salary is irrelevant to what a person of ordinary talent and experience can expect. I think it is great that some of them are worth and can be paid nearly $1M / year, but I wouldn't expect that to be relevant to the salary negotiation of most engineers taking a job with similar duties.