Your point was different from my point. I entered the thread to dispute that PoW schemes aren't weakened by forks. Here's the exchange where I came in[1]:

Original comment: "Also, with Proof of [Work] you get protection against an explosion of too many hard forks..."

My reply: "That's not what happened with the Bitcoin Cash fork though ... any given time, one of the networks is easy[er than 51%] to attack."

If you're not disputing that point, then you're not refuting my objection to that original comment.

[1] https://news.ycombinator.com/item?id=15606486