I think you're just looking at things way off-kilter, my friend.
If you look at it this way:
Sold: Higuain + Caldara
Purchased: Ronaldo + Bonucci + Cancelo + Can + Perin
We sold 1 starter (30) and 1 high potential Rotation CB (24)
We brought in 3 starters (33, 31, 24) and 2 borderline...