I believe the post you're replying to is just saying that matrix multiplications (as useful as they are), aren't going to become Skynet.
Your post is pointing out that various AI techniques are replacing loads of jobs for folks that still need to make ends meet, but likely don't have the skill sets to magically become a web developer overnight. As a result, AI is pretty dangerous like many disruptions throughout history. Only in the past, there was usually still plenty of need for labor.
The better we get at understanding how various cognitive functions that once seemed mysterious can be accomplished by matrix multiplications, the easier it becomes to eventually create Skynet.
The weird thing, I think, about these matrix multiplications, seems to be that they might be coming for the jobs of people who are generally in the same field that invented them (programmers) and also they might be coming for the jobs of reporters, creatives, and hot-take authors. People with bigger platforms than factory workers.