He's a body costing us £15m a year.
In contrast, Kaboré is a body costing us £2m a year give or take (maybe slightly more if we want to extend his contract which is running out next summer).
If Pep is really not convinced by Nunes, there is no point keeping him around just to be a cone in training sessions, warm the bench and collect 5 mins per match and the odd dead rubber run-out.
In addition, we have plenty of midfielders in Rodri, Kovacic, Kevin, Foden, Bernardo, Gundogan, McAtee, Rico and even O'Reilly, while there are question marks around Walker's legs (and cock), Rico's best position and Akanji needed as a CB.