They’re not there to babysit him lol. They’ve been n multiple battlefields not knowing who would make it without sticking to him.
Yeah, but we've seen how their dynamic got a lot deeper than their formal jobs... they become a lot more loyal and protective towards their captain and even he Knows the only reason they're sending him alone is so that he could get out of his recent "slump"
It’s just not in their character to stick to him just because he’s weaker though. It’s that situation where they admire his drive and if he ever was someone they had to coddle, they would more than likely lose interest altogether. This is just the tip of the iceberg in terms of depending their relationship. That’s why them refusing to go has as much to do with hoping he gets out of his slump, than it does with them feeling too bored and uninterested in the mission to bother going.
It's crazy they are staying behind without knowing about his regressing. he could die and not comeback guys??? Hello??? lol. Guess they realized he improves a lot whenever there is a "life or death" situation