The girls were all bitchy and basically crazy. They caused havoc and even exiled the quartet nerds for something not even their faults. MC was like meh. Just didn't really wanna get involved.
On the other hand, these people are running away because staying still = suicide. They had no other choice but to run away. MC acted like all high and might trying to lecture them like WTF.
I get that he does not have to help any of those, and if he chooses so, it's technically his rights. That being said, it's completely retard to label these people 'useless' and stuff when they literally had no other choice but to separate considering how the group looked like. It's insane. So much trying to get those female crotches I guess
UPDATE:
Those people weren't even asking for help. They were there to warn. Oh my goodness how RETARDED the MC is.