I think forced sterilisation is much more humane than forced celibacy for a severely learning disabled woman who can't manage birth control. The idea of stopping them from accessing men (i.e. accessing sex - is horrific. They have urges too)
It might be because I don't have the most active of sex drives, but ... I do not think not being able to have sex is a fate worse than death.
In fact, I think being coerced - which will with almost absolute certainly be the fate of a woman whose mental capacity is not sufficient to use condoms (which is not really that complicated) or violently raped, is much, much worse than celibacy.
No one says they shouldn't be able to masturbate. One does not need men to satisfy sexual urges. Besides, declaring a human right to partnered sex is ... not a good idea at all.
If a grown woman wants a sterilisation, she could be able to acess it much more easily than this is possible at the moment. Then perhaps no such dilemma would present itself with regard to the severely disabled - I do believe a well-meaning woman would not want to have child after child be put in foster care because she can't care for them.
Women who are such terrible people that they "don't deserve to have children" ... well, if those things were done in a sensible way, then they'd be in prison with no chance of getting pregnant.
Do people not believe that Baby P's mum should be sterilized? I can't see how you could argue against it with someone as vile as her.
I think that some people deserve death, and some people deserve to be sterilized ... however, I do not think any government should have that power.