Oprosik

But it would be great if you could go to court if necessary.

And broadcast to a bunch of people that your wife/husband is cheating on you? What a great prospect. "If necessary," family problems are resolved in other ways, not through court.

It would also be good if there were milder penalties for those who, for example, killed their wife/husband for infidelity.

Why would that be? We don't live in antiquity, and stoning is not acceptable.