I don’t think China is sending such people to re-education camps. Those camps don’t have the infrastructure required to care for such people. They only really “work” as an oubliette for able-bodied/able-minded people that will understand and carry out orders when threatened with force.

(I’d believe you if you instead said they were e.g. having nursing staff at Chinese hospitals do secret state-sanctioned eugenic infanticides, to avoid having such people around in the first place. But allowing parents to invest a lot of resources into raising unable-to-conform children, just to then inevitably send those children [likely permanently] to re-education camps, seems wasteful.)