Most people haven't played Quake/UT/CS competitively.
Btw, with modern games 30ms isn't just one full event/server tick behind. Multiplayer shootets do have 100 or higher tick rates now, so 30 would be more like 3 cycles behind
Still, it only goes to show it matters at so many levels.
Like, if using a 60Hz screen with 30ms latency, you're always almost 2 frames behind, so you always react 2 frames late, compared to another 60Hz screen person at the same ping with, say, 2ms latency.
Btw, with modern games 30ms isn't just one full event/server tick behind. Multiplayer shootets do have 100 or higher tick rates now, so 30 would be more like 3 cycles behind