Isn’t the build week you show from Kuss “polarized”? The portion of minutes that are above endurance pace (300) is 18% of the total minutes (1,705). Put another way, the average work day (excluding the rest day) is almost five hours on the bike, with 50 minutes of that being SST intensity or higher, and the other five hours being low intensity. There is less high-end vo2max work and more SST and LT than the polarized prescription, but its still pretty close overall.
Basically he’s doing a high-volume TrainerRoad plan (about an hour per day of work at SST or higher), but then adding on another 4 hours per day of low intensity training.