Probably bcs veterans don't believe in stuff like isekai thus making it harder for them to get summoned@Boomburst
I still blame the shit tier ritual for that. I'm sorry but this manga realistically depicts exactly why u don't give CHILDREN power. 3 out of 4 of each are almost guaranteed to have unhealthy mindsets that could rival Bakugous. The only solid case these brats brought up this chapter was the fact Shield boi is using a pretty damn creepy power. Why that damn ritual couldn't target REAL warriors is beyond me