I think the confusion is that Veratisium's original video made it seem like this was the only/main way electricity travels, whereas in reality, there's two separate ways: One of them take's 1/c and the other takes c/2. Also, what most people think of the light bulb going on in the real world would be the c/2 one, not the 1/c one.
The controversy is that it twists the standard definition of "on": the video boldly asserts its shocking answer of 1/d at first, only later to admit (with very little clarity) that the 1/d answer is only true if your definition of "on" is a small electromagnetic spike.
This also means that the "misconception" claim is really just click-bait and really there was never any misconception.