You have to justify the last 3 you mentioned, and you know they've been underwhelming. Seeing a lot of Juve games this past season, De Ligt has been questioned since hes joined Juve and still has cracks. Donny excels in the right circumstance, in the right team, in the right system with the right pass and if the right run is made - then whats the point in him? And FDJ, if he was good enough, would have easily displaced an ageing old Busquets.
They're not as good as you think they are, and its because they're your ajax golden darlings that you defend em.