Actually, no. For all computers, running macOS High Sierra, a computer with a root password is a whole heck of a lot more secure than one without a root account at all :)

But seriously, a fix is whatever fixes the problem.

Someone tell the Linux and UNIX users of the world that having a root account with a password is a "hack."

If setting a root password is a hack, I'm Donald Duck.

Seems like you are splitting hairs here. Clearly, the point the commenter was making is that people that have now set the root password as a result of the tweet are more secure than they were before the tweet.