To say we should sterilise people with repeated child neglect or abuse cases?

[BeHardyGoldPeer]

If you’ve failed multiple children, shouldn’t society step in to prevent further harm?

This. I have been restrained and injected when in psychiatric hospital. It is traumatic and degrading. But I know it was for my own safety when I look back.

I know people on CTO, and if they don't turn up for their injection, the police get involved.

I said in a PP about a couple with LD who have had several children removed, because they simple can't cope with them. I personally think that says more about the support network around them rather than them as parents... but they have said love is enough (it obviously isn't).

Generally we only force treatment if someone is considered to lack capacity

Involuntary psychiatric treatment is based on risk, not capacity. Ultimately the clinician in charge can legally force treatment regardless of whether the person in question is considered to have capacity or not. This slope is already well and truly slippery and open to a huge amount of abuse. Unfortunately once a patient has found themselves detained it can be incredibly difficult for them to prove they are being mistreated.