It's that there's no community cohesion. Atheists don't gather every Sunday to meet with each other and be friends and get to know each other even if they don't particularly like each other. There's no atheist pastor that meets with everyone and proactively does couples counseling and group therapy. There's no atheist diplomat peacemaker to mend things after there's been a fight. there's no central thing that everyone can come together and agree on.

Yes, organized religion goes too far and gets perverted and it's bad. but we've thrown the baby out with the bathwater in abandoning it.