Sorry, but with just blatant disregard for the obvious and strawman points, I really have nothing to say. Tempo running is essentially glorified jogging–it is not as-if the videos of Ben Johnson running 20 second 100m tempo runs indicate that it is really anything but that. It can improve circulation directly to tissues that are used in sprinting. You even mention that ‘many great 800m runners use jogging for regenerative purpose [sic]’, most who whom call it tempo running (continuous versus extensive. Empirically, it is used by nearly all great programs–far more often than programs that use alternative means. Among the very best sprinters at the moment, it is used almost to the exclusion of other elements, even traditional speed work.
I’m not against tempo runs, but it doesn’t always help to recover if these are done too hard and intensity/volume is too high. For Ben running 20sec 100’s with low volume would count as an active recovery, but for HS athlete who does tempo at speed even if it’s 75% max doesn’t always help to recover and it usually counts as another workout but not active rest. However, you didn’t answer why tempo can be very therapeutic. If all programs and very best sprinters use tempo it doesn’t explain that it’s very therapeutic. Is tempo always glorified jogging? I see many use 75% of max speed as a tempo speed, so is it really jogging? For a 22sec 200m sprinter that tempo would be just under 30sec, so it’s much faster than Ben’s 40sec speed.