Well, they might be observed a bit more if anyone could agree what "family values" actually are. The phrase is so vague that everyone gives it a different meaning. The dictionary definition refers to high moral standards and discipline, but other things might be mentioned like decency, loyalty, stability, clean living, and care and affection.
It was understood in the past that "family values" referred to a heterosexual couple, and didn't include gay couples, childless couples or single-parent households, who were beyond the pale. All possible family arrangements are now included in the term, and presumably are deemed capable of family values, whatever they might be.
Perhaps we should forget about "family values", however they're defined, and emphasise something more specific like "parenting values", which people might understand more easily. Or we could call for "civilised values", a term that would include everyone, whether or not they count as a family.
Unfortunately the term "family values" is flung about quite hypocritically by politicians and others. How often some politician who goes banging on about family values turns out to have a mistress, a drug habit, a sexual fetish or something that gives the lie to his (and it's usually his) sanctimonious public utterances. It happens so frequently that whenever a politician mentions family values nowadays, I instantly wonder what he's trying to hide.
"Family values" is just another phrase that's used as a handy smear, to suggest that your political opponents have no such values and are hedonistic rabble lacking moral standards or civilised behaviour.
Certainly Jenny and I never mention family values, which to my mind definitely implies children. But we still aspire to high moral standards.