This is false, as you disprove a few paragraphs later:
"The goal of a marketer is to grow a customer base. That’s what these growth hackers are doing, they’re just doing it in a more technically advanced way via data confirmation and split testing."
That is the entire point of using a different term for it. Precise language is a useful tool. A job title that says "we're looking for technically advanced marketers" in a concise way will get you a better signal to noise ratio.
I don't understand why this offends you.