If you are confident you can do those level 5ish threshold workouts that the AI thinks you can’t do then I think you must have hit a bug where the AI has misjudged your fitness.
I think if you go ahead and complete them regardless then you will find everything snaps into place pretty quickly.
Because you don’t know if it is or isn’t broken. Not every human is smarter than AI…
You haven’t tried it, how can you say something you haven’t used isn’t working? You can say that your current plan is working because you have tried it, but you can’t say that the thing you haven’t tried isn’t working.