No, there is a scale.
Take alcohol in pregnancy. Some women avoid it. Some women have the odd glass of wine. Some women drink moderately.
And then there are women who abuse alcohol in pregnancy to the point it could be detrimental to the babies health so SS step in.
Sex in pregnancy is normal. Having sex with the father of your baby or someone youre in a relationship with during pregnancy, practicing safe sex. No one would bat an eye. Normal.
A woman being ridiculously promiscuous or engaging in sex work during pregnancy, having unprotected sex with multiple men in unsafe setting which may have a detrimental effect of her unborn babies health, SS may step in.
Nobody is saying women can't have sex during pregnancy.
But do you honestly think rounding up dozens upon dozens of random, unscreened men to have sex with, one after another, after another whilst engaging in things like mixing semen with food and being urinated on is in the realms of normality??
It is an extreme and therefore open to criticism and potential involvement from child protection agencies.
As much as you may not like it, people will consider how the way she treats her own body affects her unborn child.
The same way a drug addict may be forced into rehab during pregnancy.