Because despite the screeching, having good parental controls standardized across distros and OSS software is an idea that benefits Linux as a whole.
Having good parental controls would be nice. Unfortunately that does not describe AB 1043
Do you think the mechanisms required by this law, as described in the linked article, constitute ”good parental control”?
Parents already have full control over this because they make the choice to give their kids a device in the first place