I do I do.
You have alternating current (AC) into the house. If it's alternating and feeds your lights, why don't the lights blink on when the current is ON and blink off when the current alternative to off.
The reason is two fold. First the alternating, the oscillation, is not between on and off; it's between one direction and the opposite direction. That is, the current is always there but it moves back and forth within the wires.
Second, at 50 or 60 cps (typical cycle rates for residences), our eyes are unable to see that oscillation in current direction. In fact must people are unable to discern oscillations above 12 to 15 cps (some will see flicker...thus the term "flicks" for old time movies).
And there you are. Your light bulb does not flicker because there is always current going one way or the other, and because whatever oscillations there might be are too fast to actually see them.