When is a NASDAQ ever not described as the tech-heavy NASDAQ? I have never heard and practically never read the acronym NASDAQ without the words tech-heavy in front of it. You would think that by this time after decades of repetition that everyone would know that the NASDAQ is tech heavy. It is no longer necessary to say tech heavy.
Of course, the S&P 500 is meant to just be the largest 500 companies anyway, regardless of sector. But the managers of the DJIA ought not to have a large portion of their 30 companies be tech.