This is utterly ridiculous.
I think it's generally understood that, in the 21st century, a "tech company" is a company that uses tech as the principal competitive advantage to replace traditional "non-21st-century-tech" incumbents.
Obviously, Netflix used streaming, collaborative filtering recommendations, and a massive CDN to replace cable TV subscriptions.
If that's not a perfect example of a tech company, I don't know what is.
Yes Netflix needed a good content library too, but that's never been its primary differentiator. NBC and HBO have been producing good content for many decades now. That's table stakes.
There's another "level" of tech companies, you could argue -- companies that supply tech rather than just use it as a competitive advantage -- e.g. Microsoft, Apple, MongoDB, Dropbox.
But today we tend to label those "software" or "hardware" companies specifically (or a combination). Perhaps in the 1980's those were the only "tech" companies. But at least ever since the dot-com era, "tech company" has meant companies that use tech as the principal competitive advantage (as opposed to merely increasing internal efficiency).