They are actually taking the right decision because they are performing really well in La Liga. So there is no reason for them to actually concentrate on other competitions and actually lose the position that they have in La Liga. I actually think it will be the best approach for them if they absolutely forget about any other competition and concentrate on only La Liga. Because they should understand that Real Madrid is not an easy competition.
Girona squad composition is not perfect like Madrid, so currently Girona is better off letting the Copa Del Rey go rather than losing the opportunity to get the La Liga Trophy, if Girona forces to target all competitions then I'm sure their squad will fail to win the trophy Considering the composition of the players they have, the quality of the reserve players that Girona has is not as good as their core players and if they force the main players to compete in all competitions it will only make the players vulnerable to injury, so it is better for Girona to focus on La Liga as a their target main thing is because winning La Liga has more prestige than the Copa Del Rey for Spanish League clubs.