Please explain how family roles, family values, beliefs and assumptions, relation to authority, gender roles, rules of conduct, pride, concept of justice, notions of modesty, etc., are all examples of "indifferent matter" that is "morally neutral" and "neither forbidden nor commanded by the Christian religion".
Further, is natural law one of those 1950s suburban sensibilities or, conversely, is it negotiable and open to subjective/situational interpretation?
"The crucial part is this: take almost any of those, and you will see the Catholic Church has either never spoken about it or if it has it has always left the governing principles broad enough to fit both a 1200s Swedish jester, a 1800s African mud-hut dweller and a 2026 Japanese video game developer. The Church is Universal after all."
For all the examples you mentioned, a Japanese, Indian or African SSPXer has radically different ones to an American, does that make them a bad tradcath?
Further, is natural law one of those 1950s suburban sensibilities or, conversely, is it negotiable and open to subjective/situational interpretation?
Obviously not, but the two often get conflated.
Just to give one example, though there's many, a man being a stay at home dad while the wife is a doctor might be odd, modern, unusual, undesirable in your opinion because X, but it's not "breaking natural law" or "against the Catholic religion".