Lol. Either you’re deliberately trying to make this more complicated, or you didn’t read my whole post and are missing the point.

I’ll try to simplify it even more for you...
I never said they have to match RPMs, hence the “RPM is held at the bottom of EACH cars HP curve”
Yes they both start at the same MPH, but no they don’t wait to hit the gas until the start of the race. As I said, they are both holding a certain, but likely different RPM, using pedal/throttle input(close to full) to maintain that same speed while staying just under the HP curve. Then at the “honk” or “starting line & mph” they floor the pedal and continue the roll race.
Next, a “rolling start” by definition is simply rolling before the start which means idle or no throttle input until like Kaumaxx said, 5mph, 1ft rollout or whatever you want to call it. But completely different than roll racing which was my point in the first place.
And using your description of the track timer related “rollout” just confirms my explanation even further. The distance traveled between the first light and second light, about 12ft, happens when the car is staging, again at idle or no throttle to avoid passing the lights.
To summarize, roll racing is used to eliminate traction issues by racing at a certain speed. This is achieved by holding the gas pedal at a certain input usually close to full throttle to maintain speed, and each car adjusts RPM/gears to maximize its power at the beginning of the HP curve at the agreed on MPH. Those parameters do not happen at 5mph, and rarely happen below 20mph or 2nd gear at the minimum. Which is why the initial explanation of a 5-180mph “roll race” and reason for the semantics debate, is ridiculous.
I hope this is easier for everyone to understand and think this horse has been beaten enough... Anyone have a real race so we can move on from this hypothetical nonsense? Please share and back to our original programming.