If you are racing someone heads up it R/T matters greatly...
I've been catching [censored] for the last week because my buddy's SHO beat my Lightning. My 13.3 @ 103 to his 13.4 @ 108. I was sleep at the tree....
If you want to be anygood at drag racing then R/Ts matter...yes, they don't really directly affect yourr E/T, but in the whole picture they matter.