Speed endurance the key to *all* 11/12second sprinters?

I don’t care what the pace is. It is irrelevant if the breaks are COMPLETE. That is NOT intensive, extensive, or any other kind of tempo.
Ben often did up to 6 x 150 with 5 to 6 min between at 14.8 to 15.2 (my timing so prob 15 45to 15.85e) as a sub maximal session.
That is NOT intensive tempo. It was enough for complete recovery for him at that pace.
If you want to change the definition of intensive tempo as far as you are concerned, then go with it and be happy.
Clearly you know best on this subject and no amount of explanation will change your mind so I might as well defer to your expertise on all things training and move on to those who have something to learn.