You're tired of hearing it? Well, there's an easy way to guarantee you'll never hear it again. Don't say silly things like that.
The reasons you are arguing are exactly why you can't use street racing as a metric, so thanks for supporting my point. On the street, all those variables AND the reaction time, distance, speed measurements are up in the air. Going to the track gives you exact timed measurements of your runs. Who said it determines exactly what the car is capable of? It determines what YOU are capable of in the car, on that day, in those conditions. With repeated runs you can average out those conditions to get an idea of your car's potential with you driving. Then, if you really want to, you can "bench race."
Going in the opposite direction (racing on the street) and then quoting track times that someone ran as a measurement of how the guy you just raced "might" have run, and trying to use that as a standard to judge your own track times is utterly ridiculous. Just think about it in context instead of getting riled up.
If you decide to go to the track one day, make ten runs and see how your first run goes compared to your last run, you will understand immediately how unreasonable your assumptions were, I PROMISE you. Or just watch! Watch people run 15's and 16's in stock cars that "the average driver can run mid-13's in." Observe how their times vary!
From your posts, it sounds like until you take my advice, you're not going to understand. So, I implore you, JUST GO TO THE TRACK.