Just about every decision courts make on “Human Rights” grounds (whether made here in the UK or in Strasbourg) are matters of interpretation. The ECHR and our own HRA are both deliberately vague and can mean almost anything one wants. Article 8, for example says this:
“Everyone has the right to respect for his private and family life, his home and his correspondence. “
Fine. I’m sure few people would disagree with that. However, what has happened in the UK is that people who otherwise have no right to be here have used Article 8 to maintain their right to stay, sometimes on the flimsiest of grounds. Among the most notorious of these claimants was probably Learco Chindamo who murdered head teacher Philip Lawrence in 1995. In August 2007, an Asylum and Immigration Tribunal ruled that Chindamo could not be deported to his home country of Italy on completion of his prison sentence, as doing so would breach his human rights. Although the Home Office argued that Chindamo presented a "present and serious threat" to society, the tribunal disagreed; they also argued that Chindamo had a right to a "family life" under the terms of the Human Rights Act 1998. David Cameron, then leader of the opposition, argued that the case highlighted the need for a fundamental review of human rights legislation in the United Kingdom, including the abolition of the Human Rights Act 1998 and its replacement with a "British Bill of Rights". I think the electorate is still holding its breath.
Have a look at Article 12, which Mrs Chapti is also citing to have her husband allowed to settle here:
“Men and women of marriageable age have the right to marry and to found a family, according to the national laws governing the exercise of this right.”
Nobody is stopping Mrs Chapti from marrying. In fact she is already married with seven children. Nowhere in Article 12 does it say that the partners must both be allowed to live in the UK if one or both of them has no right to be here. But so wide are the interpretations placed on the wording by judges in the UK that it has come to protect anybody anywhere in the world.
Vague laws are bad laws and lead to bad feeling. Other countries manage perfectly well without such legislation. Australia, for example, has no similar laws but I don’t see many cases of widespread torture or abuse there. What I do see, though, is their ability to control who can and cannot enter their shores.