Sure, and the GP was not a substantive comment. It was a generic, off-topic, flamebait tangent. Why flamebait? Because people can't discuss that topic without yelling at each other, and certainly not when the trigger is an information-free one-liner.
By the way, "substantive" isn't the same as "substantiated". It just means containing information that would be of interest to a curious reader. For example, if I describe an anecdote from my experience, that can easily be substantive without there being any need to substantiate it (e.g. by proving that it happened).
Speaking of yelling, can you please not use allcaps for emphasis on HN? This is in the guidelines: https://news.ycombinator.com/newsguidelines.html.
By the way, "substantive" isn't the same as "substantiated". It just means containing information that would be of interest to a curious reader. For example, if I describe an anecdote from my experience, that can easily be substantive without there being any need to substantiate it (e.g. by proving that it happened).