Your points are good ones. A runner who uses very short rests between quick 200s goes anaerobic quickly and doesn't optimize training effect if the goal is aerobic power. I suspect that Seb Coe was not all in the anaerobic danger zone running 20 or 30 x 200 in 28 seconds, in the first place, because his 200m speed was near 21 seconds. That is roughly 75% speed, which is not overly taxing.
I think Joe Rubio includes some quicker running on a regular basis all-year long but he doesn't make his runners go anaerobic until it is time do so, no more than Arthur Lydiard did so. It is smart and many great runners have proved so that speed of some sort done every week or nearly every week of the year can be effective as long as one doesn't dip into anaerobic reserves too often or for too long, until it is the right time of the year to hone the lactate tolerance. It is the recovery between reps that can influence if one comes to a peak too soon or if one levels off an maintains until the right moment, just as the speed of the reps is important as to how fast one comes to a peak. Tinman