It requires a level of self-driven intent LLMs aren't capable of on their own.
This is important to the framing of the idea: "the technological singularity" refers to a point in the future past which further developments can't be meaningfully foreseen or maybe even understood. This is often associated with particular paths people think will cause this, but not defined by those. As such, the prior comments are making the claim that you can get there not just by accelerating technological progress, but also by reducing the ability of everyone to comprehend what's happening, which I agree is unfortunately a plausible outcome in the current world
To expand on this, I prefer calling this "the event horizon" rather than "the singularity", as that makes it clear (I hope) that I mean "can't predict" rather than "goes to infinity".
With this framing, my prediction for that horizon has been "around 2030" for over a decade now, as several different currently-exponential growth trends start giving results with weird implications around that year.
(LLMs look like they're ahead of schedule for this, but consider their power requirements and limitations on AI in robotics that mean they're not quite good enough on the "G" part of "AGI" to affect non-desk jobs).