This is exactly it, kids with needs gravitate to kids with needs with disastrous consequences.
This is a list of things that have happened in 1 year
1 child in hospital with such a deep cut from self harm, in process of being assessed with autism (initial assessment showed almost certain) moved schools due to sibling and friendship issues
Another child constant self harming . 2 suicide attempts, diagnosed with adhd, being assessed for autism with pda. Pyschosis issues. Had to move schools as it was unsafe for her to be there due to her own doing. Accused myself of sexually assaulting her, accused me of physically assaulting her. And on top of it all believes she's a boy. (As do most of the girls she knows) school changed name and gender without even discussing with us or even telling us, and teacher who did it had no knowledge of her background before doing it
3rd child - left 2 education courses as couldnt cope. Has stole hundreds of pounds out of the house to facilitate making friends , lost sight temporarily ( functional vision loss) as sister tried to kill herself. I was in on one ward with son whilst wife was in ward across the hallway with daughter on a drip. Had 2 seizures directly from not sleeping and wandering streets as anxious about meeting friends, which then meant he couldn't go away with college as safeguarding concern , had to leave the course and now can't learn to drive .
A normal day in our house would be an horrendous day for typical households.