The reason the term "singularity" was used when that term was coined was in analogy to a black hole, which has a point on its radius called the event horizon where the gravitational pull is strong enough to stop light from escaping, thereby making it impossible to see beyond that horizon. "Technological singularity" itself here refers to the technological event which causes this, like a black hole is sometimes explained as a gravitational singularity

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